A vehicular fluid power transmitting device, comprising: a pump impeller that has a plurality of pump blades provided inside of a pump shell to which torque from a drive source is input, the pump shell having a rear shell and a front shell connected to the rear shell; a turbine runner that has a plurality of turbine blades and a hub portion, is supported by a shaft end portion of an output shaft, and is rotated by receiving operating fluid pushed out by the pump blades, the turbine blades being provided in positions opposite the pump blades, and the hub portion supporting the turbine blades; and a ring-shaped annular set member that is fixed to the front shell, wherein: the rear shell has the plurality of the pump blades and a cylindrical shaft; the pump blades are formed in a radially outer portion of the rear shell; the cylindrical shaft is formed in a radially inner portion of the rear shell and protrudes in a direction away from the drive source; an intermediate position between a position of an outer radius of the front shell and a position of a radius of the cylindrical shaft is included in a width of the annular set member in a radial direction of the annular set member; the annular set member is fixed by at least a radially outer side of the annular set member being welded to the front shell; and an intermediate radius from an axis of the output shaft to the intermediate R 3 = R 1 − R 2 / 2 + R 2 where R1 is the outer radius of the front shell, R2 is the radius of the cylindrical shaft, and R3 is the intermediate radius, the vehicular fluid power transmitting device characterized by further comprising: a damper device that is provided between the drive source and the pump shell in an axial direction of the output shaft, and has a damper input member and a damper output member, the damper input member being connected to the drive source, and the damper output member transmitting torque transmitted via an elastic member (36a, 36b) from the damper input member, to the pump shell, wherein the ring-shaped annular set member connects the damper output member to the front shell; and a plurality of interference preventing holes for preventing interference of the annular set member with rivets are formed as blind holes in the annular set member, wherein through-grooves that extend through in the radial direction are formed in the surface on the front shell side of the ring-shaped annular set member, in positions where the interference preventing holes are formed, said through-grooves serving as communication paths that discharge water collected in an annular space that is open to the radially inner side, between the inner peripheral surface of the ring-shaped annular set member, an annular bearing, and the front shell, the to the radially outer side by centrifugal force or gravity. a pump impeller that has a plurality of pump blades provided inside of a pump shell to which torque from a drive source is input, the pump shell having a rear shell and a front shell connected to the rear shell; a turbine runner that has a plurality of turbine blades and a hub portion, is supported by a shaft end portion of an output shaft, and is rotated by receiving operating fluid pushed out by the pump blades, the turbine blades being provided in positions opposite the pump blades, and the hub portion supporting the turbine blades; and a ring-shaped annular set member that is fixed to the front shell, the rear shell has the plurality of the pump blades and a cylindrical shaft; the pump blades are formed in a radially outer portion of the rear shell; the cylindrical shaft is formed in a radially inner portion of the rear shell and protrudes in a direction away from the drive source; an intermediate position between a position of an outer radius of the front shell and a position of a radius of the cylindrical shaft is included in a width of the annular set member in a radial direction of the annular set member; the annular set member is fixed by at least a radially outer side of the annular set member being welded to the front shell; and an intermediate radius from an axis of the output shaft to the intermediate R 3 = R 1 − R 2 / 2 + R 2 where R1 is the outer radius of the front shell, R2 is the radius of the cylindrical shaft, and R3 is the intermediate radius, a damper device that is provided between the drive source and the pump shell in an axial direction of the output shaft, and has a damper input member and a damper output member, the damper input member being connected to the drive source, and the damper output member transmitting torque transmitted via an elastic member (36a, 36b) from the damper input member, to the pump shell, wherein the ring-shaped annular set member connects the damper output member to the front shell; and a plurality of interference preventing holes for preventing interference of the annular set member with rivets are formed as blind holes in the annular set member, wherein through-grooves that extend through in the radial direction are formed in the surface on the front shell side of the ring-shaped annular set member, in positions where the interference preventing holes are formed, said through-grooves serving as communication paths that discharge water collected in an annular space that is open to the radially inner side, between the inner peripheral surface of the ring-shaped annular set member, an annular bearing, and the front shell, the to the radially outer side by centrifugal force or gravity.