A power supply circuit for a plurality of LED light circuits, comprising: two input terminals to be connected to a commercial AC power supply; two input conductors connected to the input terminals; a winding connected to the input conductors; two pairs of output conductors, each of the output conductors being connected to a respective one of partial windings (4A/N2, 4B/N3) resulting from dividing the winding into at least two parts, for outputting alternating-current divided by the partial windings; two pairs of output terminals (6A, 6B), each of the output terminals being connected to a respective one of the output conductors, a first pair of the output terminals being connectable to a first LED light circuit (LOAD A) and a second pair of the output terminals being connectable to a second LED light circuit (LOAD B); a plurality of rectifier circuits, a first rectifier circuit being provided between a first pair of the output conductors leading to the first pair of the output terminals connectable to the first LED circuit and a second rectifier circuit being provided between a second pair of the output conductors leading to the second pair of the output terminals connectable to the second LED circuit, for converting an alternate current resulting from division in the partial windings into a direct current; a plurality of current limiter circuits, a first current limiter circuit being provided at an output end of the first rectifier circuit and a second current limiter circuit being provided at an output end of the second rectifier circuit, for limiting a current flowing into the plurality of the LED light circuits; and two end-part windings (N1, N4), each of the end-part windings being formed at a respective end portion of the winding, wherein the plurality of partial windings (4A/N2, 4B/N3) are formed by dividing the winding excluding the both end portions of the winding, a first partial winding (4A/N2) and a second partial winding (4B/N3) are connected in series, the first pair of the output terminals (6A,6A) is connected to both ends of the first partial winding (4A/N2), the second pair of the output terminals (6B,6B) is connected to both ends of the second partial winding (4B/N3), and the two input conductors are connected to both ends of a series circuit consisting of the end-part windings (N1, N4) and the partial windings (4A/N2, 4B/N3). two input terminals to be connected to a commercial AC power supply; two input conductors connected to the input terminals; a winding connected to the input conductors; two pairs of output conductors, each of the output conductors being connected to a respective one of partial windings (4A/N2, 4B/N3) resulting from dividing the winding into at least two parts, for outputting alternating-current divided by the partial windings; two pairs of output terminals (6A, 6B), each of the output terminals being connected to a respective one of the output conductors, a first pair of the output terminals being connectable to a first LED light circuit (LOAD A) and a second pair of the output terminals being connectable to a second LED light circuit (LOAD B); a plurality of rectifier circuits, a first rectifier circuit being provided between a first pair of the output conductors leading to the first pair of the output terminals connectable to the first LED circuit and a second rectifier circuit being provided between a second pair of the output conductors leading to the second pair of the output terminals connectable to the second LED circuit, for converting an alternate current resulting from division in the partial windings into a direct current; a plurality of current limiter circuits, a first current limiter circuit being provided at an output end of the first rectifier circuit and a second current limiter circuit being provided at an output end of the second rectifier circuit, for limiting a current flowing into the plurality of the LED light circuits; and two end-part windings (N1, N4), each of the end-part windings being formed at a respective end portion of the winding, wherein the plurality of partial windings (4A/N2, 4B/N3) are formed by dividing the winding excluding the both end portions of the winding, a first partial winding (4A/N2) and a second partial winding (4B/N3) are connected in series, the first pair of the output terminals (6A,6A) is connected to both ends of the first partial winding (4A/N2), the second pair of the output terminals (6B,6B) is connected to both ends of the second partial winding (4B/N3), and the two input conductors are connected to both ends of a series circuit consisting of the end-part windings (N1, N4) and the partial windings (4A/N2, 4B/N3). the plurality of partial windings (4A/N2, 4B/N3) are formed by dividing the winding excluding the both end portions of the winding, a first partial winding (4A/N2) and a second partial winding (4B/N3) are connected in series, the first pair of the output terminals (6A,6A) is connected to both ends of the first partial winding (4A/N2), the second pair of the output terminals (6B,6B) is connected to both ends of the second partial winding (4B/N3), and the two input conductors are connected to both ends of a series circuit consisting of the end-part windings (N1, N4) and the partial windings (4A/N2, 4B/N3).