A sole surface f8 of a head 2 includes a first sole region R1. An outer edge of the region R1 includes a first edge line Eg1, a second edge line Eg2, a third edge line Eg3, and a fourth edge line Eg4. The line Eg1 is inclined so as to come closer to a face surface toward a toe side. The line Eg2 is inclined so as to come closer to the face surface toward a heel side. The line Eg3 is inclined so as to come closer to the face surface toward the heel side. The line Eg4 is inclined so as to come closer to the face surface toward the toe side. The lines Eg1 to Eg4 are joined to form a single line.