Abstract: An iron golf club head includes a main body and a hosel. A face and the hosel are made from the same material. The face includes a thin portion and a thick portion having a larger thickness than the thin portion in a face-to-back direction. The thin portion has a larger area than the thick portion. The thick portion is located centrally of a back face in a toe-to-heel direction, surrounded by the thin portion, and protrudes from the thin portion in the face-to-back direction. The face has a hardness of HV510 or more and HV600 or less. The hosel has a hardness of HV300 or less.

Abstract: A golf club head (100) includes a face section (1), a crown section (2), a sole section (3), a heel section (4), and a toe section (5). A hollow section separated from the outside is formed inside the golf club head (100). The face section (1) includes, on a back surface, a first thick section (11) disposed at the center in a toe-heel direction going from the toe section (5) to the heel section (4), a second thick section (12) disposed closer to the sole section (3) than the first thick section (11), and a thin section (13) thinner than the first thick section (11) and the second thick section (12) and disposed so as to surround the entire periphery of the first thick section (11) and the entire periphery of the second thick section (12).

Abstract: An iron golf club head includes a head member having a lace surface and a back surface located opposite to the face surface, and a badge member having an opposed surface facing the back surface and connected to the back surface and an exposed surface located opposite to the back surface the opposed surface and exposed to the outside. The badge member includes a resin plate having the opposed surface and made of a resin material, and a metal plate having the exposed surface and made of a metal material. The resin plate is provided with a plurality of recesses recessed toward the opposed surface. The plurality of recesses are arranged side by side in a toe-to-heel direction. The ratio V/S of a volume V (unit: mm3) of the badge member to an area S (unit: mm3) of the opposed surface is 4.0 or more and 10.0 or less.

Abstract: An iron golf club head includes a head member having a lace surface and a back surface located opposite to the face surface, and a badge member having an opposed surface facing the back surface and connected to the back surface and an exposed surface located opposite to the back surface the opposed surface and exposed to the outside. The badge member includes a resin plate having the opposed surface and made of a resin material, and a metal plate having the exposed surface and made of a metal material. The resin plate is provided with a plurality of recesses recessed toward the opposed surface. The plurality of recesses are arranged side by side in a toe-to-heel direction. The ratio V/S of a volume V (unit: mm3) of the badge member to an area S (unit: mm3) of the opposed surface is 4.0 or more and 10.0 or less.

Abstract: A golf club head according to an embodiment includes a face having a ball striking surface and a back surface. The back surface of the face has a thick portion located at a generally center portion thereof in a direction from the toe toward the heel, a thin portion located around the thick portion, and a tapered portion located between the thick portion and the thin portion. The thick portion has a first width which is a width in a heel-toe direction, and a second width which is a width in a sole-top direction and is larger than the first width, and the thick portion also has a first thickness. The thin portion has a second thickness smaller than the first thickness. The tapered portion has a thickness reduced from the side of the thick portion toward the side of the thin portion.

Abstract: A golf club head according to an embodiment includes a face having a ball striking surface and a back surface. The back surface of the face has a thick portion located at a generally center portion thereof in a direction from the toe toward the heel, a thin portion located around the thick portion, and a tapered portion located between the thick portion and the thin portion. The thick portion has a first width which is a width in a heel-toe direction, and a second width which is a width in a sole-top direction and is larger than the first width, and the thick portion also has a first thickness. The thin portion has a second thickness smaller than the first thickness. The tapered portion has a thickness reduced from the side of the thick portion toward the side of the thin portion.