Rotating electrical machine

A rotating electrical machine, comprising:

• a rotor on which a discharge port that discharges coolant is provided on an outer circumferential face;
• a stator core including an annular or cylindrical yoke, and teeth arranged on an inner circumferential face of the yoke in a circumferential direction with spaces, the stator core being disposed encompassing an outer circumference of the rotor, with a slot-wall-face channel being provided on a wall face of the stator core defining a slot disposed between the teeth that are adjacent in the circumferential direction, the slot-wall-face channel being configured to open as to the slot for the coolant to flow through;
• coils wound on the teeth;
• and
• an insulating sheet disposed in the slot and interposed between the stator core and the coil, the insulating sheet being configured with at least part of the slot-wall-face channel open as to the coil.