Infusion pump

An infusion pump, in which in order to temporarily hold a midway part of a detachable infusion tube in a fixed position of an infusion pump body and to place the tube in a state of interposition between a plurality of fingers which are individually driven on the outer circumferential face of the infusion tube by a pumping mechanism built into said pump body and a plate with an energizing function provided on a door pivoting on said pump body to be opened and closed, said door is fixed in relation to said pump body, and infusion is carried out by pressing said outer circumferential face with said plurality of fingers along with the driving of said pump mechanism, comprising:

• a stopper member shifted by a shift energizing force to be placed in a state of engagement with said plate when said door is open in order to place said plate in said state of interposition and in an immovable state in relation to said door;
• and
• a shape provided on said pump body for shifting said stopper member against said shifting energizing force so as to release said state of engagement when the infusion tube is properly held temporarily in said fixed position and said door is shifted to a closed state in relation to said pump body.