A medical material supply device which can percutaneously supply a material for nerve regeneration that promotes the regeneration of a nerve is insertable into a vessel and includes: a supply section configured to penetrate from an inner wall to an outer wall of the vessel at a predetermined position in the vessel, thereby being able to supply a material for nerve regeneration to the outer wall of the vessel and an elongated body which is inserted into the vessel, in which the supply section is provided with a linear portion which is provided at the elongated body and is configured to penetrate from the inner wall to the outer wall of the vessel.
