Photodynamic therapy device comprising cooling water circulation unit for blood

A photodynamic therapy device that irradiates light from a light source onto blood that has been taken out of a patient's body and is flowing in a blood tube, the blood having absorbed a photoreactive agent, to destroy an undesirable component in the blood or to affect the component, the photodynamic therapy device comprising:

• an irradiation unit that includes the light source and irradiates the blood in the blood tube with light;
• a circuit cooling block that cools the blood in the blood tube, and
• a circuit holder including the blood tube and a winding core portion around which the blood tube is disposed and wound,
• wherein the circuit cooling block is connected to a pump that circulates cooling water to the circuit cooling block, a reservoir tank, and a cooling unit that cools water, by a water flow path that flows the cooling water, and
• the circuit cooling block is brought into contact with an inner surface of the circuit holder to cool the blood in the blood tube.