Accommodating rack, replacement frame, rack system, and printing device

A replacement frame used in a printing device including a printing section configured to perform a printing process of viscous fluid on a processing object using a screen mask, the replacement frame being accommodated in an accommodating rack including a rack-side stopper, the replacement frame comprising:

• a support portion configured to support a replacement member used in the printing device;
• a passing section which is cut out on a frame inner side from a reference outer surface of the replacement frame and through which the rack-side stopper passes as the replacement frame moves;
• and
• a frame-side stopper protruding from the passing section to the reference outer surface and engaging with the rack-side stopper to restrict removal of the replacement frame in a pulled-out state in which the replacement frame is pulled out from the accommodating rack,
• wherein the frame-side stopper is an L-shaped member disposed on an inner surface of the replacement frame, and includes a support plate and a locking section, the support plate being a plate-shaped portion disposed along the inner surface of the replacement frame, and the locking section being continuously connected to the support plate and being a plate-shaped portion disposed substantially perpendicular to the inner surface of the replacement frame.