A drive plate comprising: a disk-shaped plate portion; and a tooth-shaped portion formed at an outer peripheral end of the plate portion, wherein: the plate portion and the tooth-shaped portion are integrally shaped from a single steel plate material; characterized in that the plate portion and the tooth-shaped portion include a carburized layer (15, 25) provided over an entire surface layer of the plate portion and the tooth-shaped portion, the carburized layer (15, 25) having a carbon concentration higher than that of a center portion (17, 27) of the plate portion and the tooth-shaped portion in a thickness direction; the carburized layer of the plate portion is higher in hardness than the center portion of the plate portion in the thickness direction; the carburized layer of the tooth-shaped portion has been subjected to a quenching process, and is further higher in hardness than the carburized layer of the plate portion; the center portion of the above plate portion in the thickness direction has a ferrite structure; the above carburized layer of the above plate portion has a pearlite structure; and the above carburized layer of the above tooth-shaped portion has a martensite structure. a disk-shaped plate portion; and a tooth-shaped portion formed at an outer peripheral end of the plate portion, wherein: the plate portion and the tooth-shaped portion are integrally shaped from a single steel plate material; characterized in that the plate portion and the tooth-shaped portion include a carburized layer (15, 25) provided over an entire surface layer of the plate portion and the tooth-shaped portion, the carburized layer (15, 25) having a carbon concentration higher than that of a center portion (17, 27) of the plate portion and the tooth-shaped portion in a thickness direction; the carburized layer of the plate portion is higher in hardness than the center portion of the plate portion in the thickness direction; the carburized layer of the tooth-shaped portion has been subjected to a quenching process, and is further higher in hardness than the carburized layer of the plate portion; the center portion of the above plate portion in the thickness direction has a ferrite structure; the above carburized layer of the above plate portion has a pearlite structure; and the above carburized layer of the above tooth-shaped portion has a martensite structure. the plate portion and the tooth-shaped portion are integrally shaped from a single steel plate material; characterized in that the plate portion and the tooth-shaped portion include a carburized layer (15, 25) provided over an entire surface layer of the plate portion and the tooth-shaped portion, the carburized layer (15, 25) having a carbon concentration higher than that of a center portion (17, 27) of the plate portion and the tooth-shaped portion in a thickness direction; the carburized layer of the plate portion is higher in hardness than the center portion of the plate portion in the thickness direction; the carburized layer of the tooth-shaped portion has been subjected to a quenching process, and is further higher in hardness than the carburized layer of the plate portion; the center portion of the above plate portion in the thickness direction has a ferrite structure; the above carburized layer of the above plate portion has a pearlite structure; and the above carburized layer of the above tooth-shaped portion has a martensite structure.