A power supply switching control system configured to switch a power supply for supplying power to a plurality of loads (L, L1-L4) between a first power supply and a second power supply in a power supply system that includes the first power supply and the second power supply connected in parallel to the plurality of loads (L, L1-L4) and wherein the first power supply , the second power supply , and the plurality of loads (L, L1-L4) are connected through a power supply path (EL) in an order of the first power supply , the load (L, L1-L4), and the second power supply , the power supply switching control system comprising: a first switch that is a MOSFET provided between a connection point (P1) of the first power supply and a connection point (P2) of the plurality of loads (L, L1-L4) in the power supply path (EL) and configured to cut off a current flowing from a side of the second power supply to a side of the first power supply in an off state of the first switch ; a second switch that is a MOSFET provided between a connection point (P3) of the second power supply and the connection point (P2) of the plurality of loads (L, L1-L4) in the power supply path (EL) and configured to cut off a current flowing from a side of the first power supply to a side of the second power supply in an off state of the second switch ; and a control unit configured to set the second switch in an on state when the second power supply is charged; characterized by a plurality of third switches configured to be connected in series to the power supply path (EL) and arranged between the first switch and the second switch , wherein each of the third switches is configured to cut off a bidirectional current flowing therethrough in an off state thereof; and wherein each of the plurality of loads (L, L1-L4) is configured to be connected according to one of: between the first switch and one of the third switches , between the second switch and another of the third switches , and between the third switches in the power supply path (EL) . a first switch that is a MOSFET provided between a connection point (P1) of the first power supply and a connection point (P2) of the plurality of loads (L, L1-L4) in the power supply path (EL) and configured to cut off a current flowing from a side of the second power supply to a side of the first power supply in an off state of the first switch ; a second switch that is a MOSFET provided between a connection point (P3) of the second power supply and the connection point (P2) of the plurality of loads (L, L1-L4) in the power supply path (EL) and configured to cut off a current flowing from a side of the first power supply to a side of the second power supply in an off state of the second switch ; and a control unit configured to set the second switch in an on state when the second power supply is charged; characterized by a plurality of third switches configured to be connected in series to the power supply path (EL) and arranged between the first switch and the second switch , wherein each of the third switches is configured to cut off a bidirectional current flowing therethrough in an off state thereof; and wherein each of the plurality of loads (L, L1-L4) is configured to be connected according to one of: between the first switch and one of the third switches , between the second switch and another of the third switches , and between the third switches in the power supply path (EL) . <EOS>