Provided is a medical tube which allows a catheter to contact to the interior wall of a tubular organ and makes it possible to reliably perform suctioning operations even if the valve is occluded. This medical tube (10), which is inserted into a tubular organ and discharges and suctions fluid, is provided with a tube-shape main body (20) which extends a prescribed length and with a valve (30) which is disposed in a portion of the main body (20) that is inserted into the tubular organ and can discharge or suction a fluid, wherein the valve (30) comprises multiple slits (31) which are formed so as to extend axially of the body (20) a prescribed length, reaching from the outer periphery to the inner periphery of the main body (20), and which are provided spaced in the circumferential direction of the main body (20). Each slit (31) is formed tilted in the same direction with respect to a radially-extending line (L) which passes through the axial center (C) of the main body (20).
