An infusion set comprising: a base (60) having upper and lower sides (92, 118), a base cannula (52) extending downwardly from the lower side (118), a flange (96) and an access point (62) extending upwards from the upper side (92), the access point (62) being in fluid communication with the base cannula (52), and the access point (62) comprising a partition (130) adapted to seal the lateral access point (62) from the fluid communication therethrough； an adhesive layer (50) mounted on the lower side (118) of the base (60)； an introduction cover (64) adapted to be pressed against the upper side (92) of the base (60) and detachably fixed to the base (6), the introduction cover (64) comprising the upper and lower sides and a needle (66) extending downwards from the lower side, the needle (66) being adapted to extend through the partition (130) on the upper side of the base (60) and through the cannula (52) of the base on the lower side (118) of the base (60) and an infusion cover (54) comprising an upper side and a lower side, a coupling part (74) of the access point with a tubular wall ( 86) and barbed feet (94) adapted to engage the flange (96) of the base (60), the infusion cover (54) being detachably detachable from the base (60), the coupling part (74) to the access point with its tubular wall (86), which closely surrounds the access point (62) when the infusion cover (54) is attached to the base (60), the t being Infusion unit (54) adapted to rotate with respect to the base (60), while the infusion cover (54) comprises an infusion cannula (170) extending downwardly from the bottom side of the cover (54) of infusion, and a flexible elongated lumen (162) in fluid communication with the infusion cannula (170), the infusion cannula (170) being adapted to extend through the partition (130) on the upper side of the base ( 6) by attaching the infusion cover (54) and the base (60) to place the flexible lumen (162) and the infusion cover (54) in fluid communication with the
