In an electrical connection terminal assembly and an electromotive drive device, a connector-side terminal is divided into two portions along an insertion direction of the connector-side terminal, thereby constituting divided terminal pieces. These divided terminal pieces are inserted between elastic terminal pieces of a base-board-side terminal, thereby electrically connecting the two parties. In this manner, the connector-side terminal is divided into the two portions to constitute the divided terminal pieces, and thus the rigidity of each of the divided terminal pieces can be decreased. Even if the connector-side terminal has been connected to the base-board-side terminal by prying, the divided terminal pieces of the connector-side terminal deform readily to follow the shape of the base-board-side terminal and thus it is possible to suppress an increased change in an electrical resistance and/or a thermal resistance between the base-board-side terminal and the connector-side terminal.