Abstract: A golf club head includes a face portion that forms a striking face, a crown portion, a sole portion, and a hosel portion. The striking face has a face center. The sole portion includes a toe protruding portion that is a protruding portion provided on a toe side with respect to the face center and is hollow. The toe protruding portion is not present on a heel side with respect to the face center. The toe protruding portion is formed so as to be continuous with the face portion. The height of the toe protruding portion at its apex may be greater than or equal to 1.5 mm and less than or equal to 8 mm. The golf club head is excellent in rebound performance. In the golf club head, the rebound performance can be improved by deformation of the toe protruding portion at impact.

Abstract: A head includes a face portion, a crown portion, a sole portion, and a hosel portion. The crown portion includes a protruding portion on a crown outer surface. The protruding portion does not form any part of an outer contour line of the head in a front view of the head as viewed from a face side. The protruding portion forms an outer contour line of the head in a heel projection figure in which the head that is placed on a ground plane such that a shaft axis line is perpendicular to the ground plane and a face angle is 0° is viewed from a heel side along the ground plane. In this head, aerodynamic drag and lifting force at a position at which the shaft axis line becomes parallel to the ground plane during downswing can be increased. In this head, air resistance at impact can be suppressed.

Abstract: A state of a head placed such that its shaft axis is vertical to a horizontal plane and a face normal line is parallel to a perpendicular plane on which the shaft axis lies is defined as a 0-degree state. A direction parallel to the perpendicular plane and parallel to the horizontal plane is defined as a projection direction. A projected area of the head projected in the projection direction when the head is rotated by ?° about the shaft axis toward a back side from the 0-degree state is denoted by WA?. WA? is divided by the shaft axis into an area Af? and an area Ab?. Airflow causes a force acting on the area Af? in a face-closing direction and a force acting on the area Ab? in a face-opening direction. (Af90?Ab90) is ?4500 (mm2) or less. (Af15?Ab15) is 4700 (mm2) or less.

Abstract: A head includes a face member constituting at least a part of a striking face, a head body having a face opening, and a weight member fixed to the head body. The face opening is covered by the face member. The weight member includes an exposed surface constituting a part of a sole surface and/or a part of a back surface. The head body includes a weight member receiving portion into which the weight member is inserted from a first side and that holds the weight member. The weight member receiving portion penetrates through the head body from the first side to a second side. The exposed surface is formed on the second side of the weight member. A welded portion is formed on a boundary between the weight member and the head body on the first side of the weight member.

Abstract: A golf club head includes a face portion including a hitting face, a sole portion, a crown portion, and a hosel portion. The sole portion includes a center thin-wall part and an outer thick-wall part that is formed on a sole outer edge side of the center thin-wall part and is thicker than the center thin-wall part. The outer thick-wall part includes a first thick-wall part that is formed over a region including a position of a center of gravity of the head in a face-back direction, and a second thick-wall part that is positioned on a back side of the first thick-wall part and is thicker than the first thick-wall part. The outer thick-wall part of the sole portion may further include a third thick-wall part that is positioned on the back side of the second thick-wall part and is thinner than the second thick-wall part.

Abstract: A golf club head includes a club face, a crown, a leading edge, and a heel portion. The crown includes a first portion being adjacent to the club face, and a second portion being located backwardly of the first portion and connected to the first portion. The second portion is located below the first portion via a step portion. The first portion includes a face-vicinity portion extending in a toe-heel direction along the club face, and a heel-vicinity portion connected to a heel-side end portion of the face-vicinity portion and extending backwardly of the head along a heel-side contour of the crown. In a head plan view, a length A in a head front-back direction from the leading edge to a back-side end of the heel-vicinity portion is equal to or more than 70% of a maximum length B of the head in the head front-back direction.

Abstract: A state of a golf club head placed such that a shaft axis line is vertical to a horizontal plane and a normal line is parallel to a first perpendicular plane on which the shaft axis line lies is defined as a 0-degree state. A direction parallel to the first perpendicular plane and parallel to the horizontal plane is defined as a projection direction. A projected area of the head projected in the projection direction when the head is rotated by ?°about the shaft axis line toward a back side from the 0-degree state is denoted by WA?. WA? is divided by the shaft axis line into a first region (having an area denoted by Af?) and a second region (having an area denoted by Ab?), and a difference (Af?-Ab?) is denoted by S?. S90 is -4500 (mm2) or less. S15 is 4700 (mm2) or less.

Abstract: A golf club head includes a club face, a crown, a leading edge, and a heel portion. The crown includes a first portion being adjacent to the club face, and a second portion being located backwardly of the first portion and connected to the first portion. The second portion is located below the first portion via a step portion. The first portion includes a face-vicinity portion extending in a toe-heel direction along the club face, and a heel-vicinity portion connected to a heel-side end portion of the face-vicinity portion and extending backwardly of the head along a heel-side contour of the crown. In a head plan view, a length A in a head front-back direction from the leading edge to a back-side end of the heel-vicinity portion is equal to or more than 70% of a maximum length B of the head in the head front-back direction.

Abstract: A golf club head includes a face portion that forms a striking face, a crown portion, a sole portion, and a hosel portion. The striking face has a face center. The sole portion includes a toe protruding portion that is a protruding portion provided on a toe side with respect to the face center and is hollow. The toe protruding portion is not present on a heel side with respect to the face center. The toe protruding portion is formed so as to be continuous with the face portion. The height of the toe protruding portion at its apex may be greater than or equal to 1.5 mm and less than or equal to 8 mm. The golf club head is excellent in rebound performance. In the golf club head, the rebound performance can be improved by deformation of the toe protruding portion at impact.

Abstract: A head includes a face portion, a crown portion, a sole portion, and a hosel portion. The crown portion includes a protruding portion on a crown outer surface. The protruding portion does not form any part of an outer contour line of the head in a front view of the head as viewed from a face side. The protruding portion forms an outer contour line of the head in a heel projection figure in which the head that is placed on a ground plane such that a shaft axis line is perpendicular to the ground plane and a face angle is 0° is viewed from a heel side along the ground plane. In this head, aerodynamic drag and lifting force at position 9 can be increased. In this head, air resistance at position 6 can be suppressed.