<p>A scroll compressor (1) of the present invention includes a pressing mechanism (75) and a back-flow prevention mechanism (35). The pressing mechanism (75) includes a back-pressure chamber (53) facing a back surface of a movable-scroll end plate (71), and a back-pressure supply path (80) for allowing the back-pressure chamber (53) to communicate with a compression chamber (23) which is in a state right before the compression chamber (23) communicates with an outlet port (64) or a state in which the compression chamber (23) communicates with the outlet port (64). The back-flow prevention mechanism (35) allows refrigerant of the back-pressure supply path (80) to flow from the compression chamber (23) to the back-pressure chamber (53), and prevents fluid of the back-pressure supply path (80) from returning from the back-pressure chamber (53) to the compression chamber (23).</p>
