Seat recliner for vehicle and method of manufacturing the same

A seat recliner for a vehicle, the seat recliner comprising:

• a fixing flange provided with multiple guide parts spaced apart from each other and having a guide groove formed along a locus having a predetermined distance from a center axis of the fixing flange;
• and
• a rotary cam mounted on a center portion of the fixing flange, and configured to rotate about the center axis and press a locking gear such that the locking gear slides along the multiple guide parts,
• wherein the rotary cam includes:
• at least one first protrusion formed on a mount surface of the rotary cam, the mount surface coming into contact with the fixing flange when mounted, and
• at least one second protrusion formed on a surface opposite to the mount surface, and configured to engage with a control plate,
• wherein the at least one first protrusion is inserted into the guide groove such that the guide groove guides a rotation of the rotary cam.