There is provided a therapeutic apparatus for photodynamic therapy that includes a hollow tube inserted into a living body; an unfolding part that is coupled to one end of the tube and is unfolded; a light irradiation part that is disposed in the unfolding part to irradiate light; and an operating part that is coupled to the other end of the tube to unfold the unfolding part, wherein the light irradiation part irradiates light when the unfolding part is unfolded.The therapeutic apparatus for photodynamic therapy according to the present disclosure allows irradiation of light by unfolding tissues of the curved portion in the living body, using an unfolding part capable of being unfolded depending on the user's selection and the light irradiation part coupled to the unfolding part, there is an effect of allowing the use of the photodynamic therapy even in a portion that cannot be conventionally treated using the photodynamic therapy.