A door lock apparatus includes: a link member interposed between a latch mechanism and an open lever and selectively operated between an unlock position and a lock position, the unlock position in which an operation of the open lever is transmitted to the latch mechanism, and the lock position in which the operation is not transmitted to the latch mechanism; and a lock operation lever including an active lever and a sub lever, the sub lever configured to operate integrally with the active lever when the link member is switched to the lock position and to cooperate with the active lever via a biasing member when the link member is switched to the unlock position. The lock operation lever is an assembly containing the active lever, the sub lever and the biasing member.