To provide a manufacturing method of an electric pump which improves the workability and suppresses an increase in manufacturing costs.SOLUTION: A busbar unit 80x includes an approximately C-shaped first ring portion 82u, a second ring portion 82n that is located on the radial outer side of the first ring portion and has a substantially C shape, a plurality of connecting portions 88u1 to 88u5 that connect the first ring portion 82u and the second ring portion 82n, and first and second hook portions 84u and 84n extending radially outward from the outer peripheral edge of the first and second ring portions, and curved in the middle and extending radially inward, and a stator includes a plurality of split iron cores, a plurality of split coil bobbins, and a plurality of split coils that surround the housing from the outside, a manufacturing method of an electric pump includes a connection step of engaging drawing portions drawn from the plurality of split coils with the first and second hook portions, and welding the drawing portions, and a cutting step of cutting the connection portion after the connection step.SELECTED DRAWING: Figure 9