Abstract: A package body 4, is provided with a spout 3 which is welded to an inner surface of a mouth portion of the body 4. The spout 3 has an outer periphery of a welding part 13 having a curved outer surface of a boat shape in a plan view at a seat 8, and the outer periphery of the welding part 13 is welded to the inner surface of the mouth portion. The spout 3 includes a projected piece 12 at an outer periphery above the seat 8. The package body 4 is accommodated within a housing provided with a casing 1 openable about a hinge 2. The body 4 is arranged within the casing 1 in an opened state, with the spout 3 being directed upwardly, and then the casing 1 is closed to accommodate the package body 4. The spout 3 is fixed by a fixture 5 which is dividable into two halves with a center hole. This hole has a groove 20 for fixing the projected piece 12 of the spout 3 from the outside in the combined state of the spout fixture 5, and with a curved surface 21 for fixing the periphery 13 of the spout 3.