In a microcatheter (1), the shaft tube (2) thereof is sectioned into a proximal zone (3), an intermediate zone (4) and a distal zone (5) from said connector to the forward end thereof, each being formed of a multilayered tube, consisting of three types of multilayered tubes different in hardness, an inner layer (8) extending along all the zones from the proximal zone (3) to the distal zone (5) of said shaft tube (2), and a reinforcing material (7) being fitted to the outer circumference of said inner layer (8), a first outer layer (11) extending along all the zones from the proximal zone (3) to the distal zone (5) of said shaft tube (2) so as to coat, and adhere to, said inner layer (8) and said reinforcing material (7), to form a base layer structure composed of the inner layer (8)/reinforcing material (7)/first outer layer (11), a third outer layer (13) coating the first outer layer (11) of said base layer structure in the proximal zone (3), a second outer layer (12) coating the first outer layer (11) of said base layer structure in the intermediate zone (4), the microcatheter hence being improved in pressure resistance and improved in antikinking property, which enables superselective approaching a minute blood vessel.