Carbon dioxide separator

A carbon dioxide separator comprising:

• a dehydrator connected to a heat exchanger configured to cool an exhaust gas discharged from an internal combustion engine, the dehydrator being configured to remove moisture contained in the exhaust gas flowing in from the heat exchanger;
• a carbon dioxide collector configured to adsorb and/or absorb carbon dioxide contained in the exhaust gas that has passed through the dehydrator;
• and
• a draining structure provided on a flow path for the exhaust gas between the heat exchanger and the dehydrator, the draining structure being configured to inhibit water resulting from condensation in the exhaust gas from moving along the flow path to flow into the dehydrator.