An iron type golf club head has a club face provided with face lines and comprises an external weight member secured to a sole portion of a head main body and having a specific gravity larger than the head main body. The external weight member has a center of gravity located on the toe side of the middle point in the toe-heel direction of the face lines, and comprises a wide portion and a narrow portion located on the heel side of the wide portion. The wide portion is located on the toe side of the above-mentioned middle point. The wide portion has a front edge extending along the leading edge of the sole portion, and the narrow portion has a front edge extending along the leading edge and located backward of the front edge of the wide portion.