A method for manufacturing an electric motor stator, including: attaching a hollow bracket to an end of a hollow stator core and allowing a lead connected to the winding to pass through an opening formed in a peripheral surface of the bracket to take out the lead to an outside of the bracket; placing a core material inside the stator core and the bracket; attaching a sealing member to an outer peripheral surface of the bracket so as to block the opening while allowing the lead to pass through the through-hole; and filling a molten resin into an annular space between the stator core and the core material and between the bracket and the core material, to form a resin unit.