A rotating electrical machine includes a control board that has a control circuit portion on a main first surface, a power circuit portion, and a heat dissipating portion that covers the power circuit portion, a holder that opposes a second main surface of the control board which is an opposing surface to the first main surface, and a support member that supports the holder, wherein the holder includes a plurality of protrusions that project towards the second main surface, and at least a portion of the plurality of protrusions are disposed so as to overlap with the power circuit portion in a plan view.