A central power supply member (S) for supplying power to windings of a stator of a motor has ring-shaped busbars (10) each including a power supply terminal (20) and connecting terminals (30) laminated and accommodated in a synthetic resin holder (50) while being insulated from each other. Power-supply side terminals (91) drawn out from a power supply are placed on the power supply terminals (20) of the busbars (10) and connected by tightening bolts (95). The holder (50) has terminal blocks (55) on which the power supply terminals (20) are placed and in which nuts (65) to be engaged with the bolts 95 are mounted with the rotation thereof prevented. Insertion grooves (88) as rotation preventing portions are formed in the rear surfaces of the terminal blocks (55) and receive bulges (27) formed on the lateral edges of vertical plates (22) of the power supply terminals (20).