The carbon dioxide supply system includes: a reservoir reserving carbon dioxide; a pump arranged on a downstream side of the reservoir in a supply direction for the carbon dioxide for feeding the carbon dioxide with pressure while suppressing pulsation; a first pipe connecting the reservoir and the pump with each other; a second pipe connected to the downstream side of the pump in the supply direction and having no pulsation buffering device buffering pulsation of the pump; and a cooling apparatus interposed at least in an intermediate portion of the first pipe.