An induction heating power supply apparatus comprising: a smoothing section configured to smooth a pulsating current of DC power that has been output from a DC power supply section; an inverter section configured to convert the DC power smoothed by the smoothing section into AC power; and an output section configured to output the AC power into which the DC power has been converted by the inverter section, wherein the output section comprises a pair of output bus bars (7a, 7b), wherein the inverter section comprises at least one bridge (B1, B2), the bridge (B1, B2) comprising a first module and a second module, each of the first module and the second module comprising two switching devices connected to each other in series, and wherein the smoothing section comprises a pair of first bus bars (5a1, 5b1) to be connected to an output portion of the DC power supply section and an input portion (M1in+, M1in-) of the first module, at least one capacitor (C1-1, C1-2) connected to the pair of first bus bars (5al, 5b1), a pair of second bus bars (5a2, 5b2) to be connected to the output portion of the DC power supply section and an input portion (M2in+, M2in-) of the second module, and at least one capacitor (C2-1, C2-2) connected to the pair of second bus bars (5a2, 5b2), characterized in that the pair of output bus bars (7a, 7b) is interposed between the first module and the second module of the bridge (B1, B2) such that an output portion (M1out) of the first module is connected to one of the output bus bars (7a, 7b) and an output portion (M2out) of the second module is connected to the other output bus bar (7a, 7b), wherein the pair of first bus bars (5a1, 5b1) extends in parallel with the pair of output bus bars (7a, 7b) and is disposed such that the first module is interposed between the pair of first bus bars (5a1, 5b1) and the pair of output bus bars (7a, 7b), and wherein the pair of second bus bars (5a2, 5b2) extends in parallel with the pair of output bus bars (7a, 7b) and is disposed such that the second module is interposed between the pair of second bus bars (5a2, 5b2) and the pair of output bus bars (7a, 7b). a smoothing section configured to smooth a pulsating current of DC power that has been output from a DC power supply section; an inverter section configured to convert the DC power smoothed by the smoothing section into AC power; and an output section configured to output the AC power into which the DC power has been converted by the inverter section, wherein the output section comprises a pair of output bus bars (7a, 7b), wherein the inverter section comprises at least one bridge (B1, B2), the bridge (B1, B2) comprising a first module and a second module, each of the first module and the second module comprising two switching devices connected to each other in series, and wherein the smoothing section comprises a pair of first bus bars (5a1, 5b1) to be connected to an output portion of the DC power supply section and an input portion (M1in+, M1in-) of the first module, at least one capacitor (C1-1, C1-2) connected to the pair of first bus bars (5al, 5b1), a pair of second bus bars (5a2, 5b2) to be connected to the output portion of the DC power supply section and an input portion (M2in+, M2in-) of the second module, and at least one capacitor (C2-1, C2-2) connected to the pair of second bus bars (5a2, 5b2), characterized in that the pair of output bus bars (7a, 7b) is interposed between the first module and the second module of the bridge (B1, B2) such that an output portion (M1out) of the first module is connected to one of the output bus bars (7a, 7b) and an output portion (M2out) of the second module is connected to the other output bus bar (7a, 7b), wherein the pair of first bus bars (5a1, 5b1) extends in parallel with the pair of output bus bars (7a, 7b) and is disposed such that the first module is interposed between the pair of first bus bars (5a1, 5b1) and the pair of output bus bars (7a, 7b), and wherein the pair of second bus bars (5a2, 5b2) extends in parallel with the pair of output bus bars (7a, 7b) and is disposed such that the second module is interposed between the pair of second bus bars (5a2, 5b2) and the pair of output bus bars (7a, 7b).