To provide a screen printing machine preventing the occurrence of the wrinkles of a master or skew without increasing the strength of a plate supply and discharge unit and suppressed in the increase of a wt. in low cost.

In a screen printing machine equipped with a plate cylinder 1, an ink supply means 10, a plate supply and discharge unit 30 having a support shaft 31 supporting a master, a platen roller 22 supplying the master 2 to the plate cylinder and a taking-up shaft 32 taking up the master 2 through the outer peripheral surface of the plate cylinder 1, the thermal head 21 making the master 2 and the support means 35 supporting the plate supply and discharge unit 30 in a freely rotatable manner, the spring 36 energizing the plate supply and discharge unit 30 toward the center of the plate cylinder and the hook 52 fixing the plate supply and discharge unit to the plate cylinder 1 are provided.