A pallet clamp apparatus for clamping a pallet to a pair of forks provided in a forklift, comprising: a housing disposed adjacent to each of the pair of forks; a locking member, at least a portion of the locking member protruding to the outside of the housing to fix the pallet; a spring member configured to elastically press the locking member toward an inner side of the fork in a lateral direction; and a release member configured to release fixing of the locking member by pressing the spring member, wherein the locking member comprises: a pair of main plates spaced apart in a vertical direction and disposed parallel to each other; a support plate disposed at an outer end of the main plate, the outer end facing an adjacent fork; and a first stopper disposed on an inner end of the main plate, the inner end facing toward the inner side of the fork, wherein the support plate and the first stopper are positioned between the two main plates, characterized in that an inner surface of the support plate is in contact with the release member and a socket ring configured to fix an outer end of the spring member is disposed on an outer surface of the support plate, and in that the socket ring is disposed to be eccentric toward the front in an outer surface of the support plate. a housing disposed adjacent to each of the pair of forks; a locking member, at least a portion of the locking member protruding to the outside of the housing to fix the pallet; a spring member configured to elastically press the locking member toward an inner side of the fork in a lateral direction; and a release member configured to release fixing of the locking member by pressing the spring member, wherein the locking member comprises: a pair of main plates spaced apart in a vertical direction and disposed parallel to each other; a support plate disposed at an outer end of the main plate, the outer end facing an adjacent fork; and a first stopper disposed on an inner end of the main plate, the inner end facing toward the inner side of the fork, wherein the support plate and the first stopper are positioned between the two main plates, characterized in that an inner surface of the support plate is in contact with the release member and a socket ring configured to fix an outer end of the spring member is disposed on an outer surface of the support plate, and in that the socket ring is disposed to be eccentric toward the front in an outer surface of the support plate. a pair of main plates spaced apart in a vertical direction and disposed parallel to each other; a support plate disposed at an outer end of the main plate, the outer end facing an adjacent fork; and a first stopper disposed on an inner end of the main plate, the inner end facing toward the inner side of the fork, wherein the support plate and the first stopper are positioned between the two main plates, characterized in that an inner surface of the support plate is in contact with the release member and a socket ring configured to fix an outer end of the spring member is disposed on an outer surface of the support plate, and in that the socket ring is disposed to be eccentric toward the front in an outer surface of the support plate.