A solenoid spool valve includes a spool valve, a spring, and an electromagnetic actuator. The spool valve has a generally cylindrical sleeve provided with a fluid input port and a fluid output port and a spool supported in the sleeve for axial displacement to switch between said input and output ports. The spring abuts a first working face of said spool to energize said spool in a first axial direction. The electromagnetic actuator provides an axial drive force to a second working face of said spool in a second axial direction that is substantially opposite to said first axial direction. The first and second working faces are disposed axially inside of both axial end portions of a bearing, respectively, for slidably supporting said spool in said sleeve.