A conveyance device (4) of this disclosure is a conveyance device (4) for a heat treatment device (S) that presses a conveyed body (T) to convey the conveyed body in a linear direction, and includes a cylinder mechanisms (6a, 6b) having a retractable rod (5) that presses the conveyed body (T), in which: an abutting member (7) is disposed at a tip part of the rod (5) of the cylinder mechanism (6a, 6b) so that the abutting member abuts locations, which are different from each other in a circumferential direction, on an outer peripheral surface of the conveyed body; a guide rail (8) configured to guide the abutting member (7) is provided; and the abutting member is provided with a traveling roller (10) that travels on the guide rail (8).