A combination slide has a slide body and two pressing rods. The slide body has a head member, a tail member and multiple connecting members. The head member has a head quick-release engaging element. The tail member has a tail quick-release engaging element. Each connecting member has an upper intermediate quick-release engaging element engaged detachably with the head quick-release engaging element and a lower intermediate quick-release engaging element engaged detachably with the tail quick-release engaging element of the tail member or the upper intermediate quick-release engaging element of an adjacent connecting member. The combination slide can be quickly assembled or disassembled.