There is provided a vehicular transmission in which eccentric abrasion of a check valve interposed in a hydraulic pressure supplying passage of two systems of a mechanical pump and a motor-operated pump driven by driving sources of a traveling system is prevented from occurring to reduce pressure loss of supplied pressure. The check valve (70) interposed in the supplying oil passage from the mechanical pump is disposed between a valve bodies (40) by securing a valve case (72) to a mission case (41) so that its axial direction conforms to a direction of gravity. Oil from the hydraulic pressure supplying passage of the mission case flows in the axial line from a valve seat (72a) along a concave channel (72b) of the valve case (72) and flows out of outflow ports (76a and 76b) at the lower end to the hydraulic pressure supplying passage of the valve body (40). A ball (73) is movable between the valve seat (72a) and a stopper section (75a) along the axial line.