To provide a compressor having a relatively high degree of freedom of design of a preventive means of self-excitation vibration, by preventing the self-excitation vibration of a check valve regardless of opening of the check valve such as a suction valve.

This compressor 10 has a compression space 31 and a fluid storage chamber, and is formed by arranging the check valve between both chambers, and moves fluid to the other chamber from one chamber. The compressor 10 is also provided with a vibration preventive member 39a substantially always abutting on a part or the whole of the check valve on the downstream side of the check valve. Since the vibration preventive member 39 substantially always abuts on a part or the whole of the check valve, the check valve trying to vibrate by self-excitation is substantially always regulated by the vibration preventive member 39, and the self-excitation vibration of the check valve is hindered.