The tire vulcanizer is featured by including a slide back mechanism configured such that the upper metal mold separated and lifted from the lower metal mold installed to be fixed to a base is moved by an operation of a movable carriage so as to reciprocate between a vulcanization position at which the upper metal mold is pressed toward the lower metal mold, and a waiting position at which the green tire can be carried in the lower metal mold and at which the cured tire can be carried out from the lower metal mold, and is featured in that the upper metal mold is attached below, via a squeezing cylinder mechanism, to a beam integrated with a tie rod which is vertically moved by an operation of a lifting/lowering cylinder along a guide hole provided in the movable carriage.