To provide a stable electric liquid pump without causing parts breakage even when large heat generation occurs in electronic circuit parts by a high current.

In an electric liquid pump 1 having a casing 2 provided with an impeller driven to rotate by a motor 6 rotatably provided inside, and a passage for liquid to flow to suck liquid from an entrance 3 into the casing 2 by rotation of the impeller to be discharged from an exit 4 outside, an electronic circuit part 30 is provided on a wall 2a at a part of the casing 2 to get in contact with liquid directly or through an intermediate member 8 to accelerate heat radiation, and thickness of the wall 2a of a contact part 23 where the electronic circuit part 30 is installed is set in such a way that the electronic circuit part 30 can be cooled by flowing liquid in the casing 2.