A circuit module, comprising: a circuit part; an input terminal part electrically connected to a pair of input points (T11, T12) of the circuit part; an output terminal part electrically connected to a pair of output points (T21, T22) of the circuit part; and a support body configured to support the circuit part, the input terminal part and the output terminal part, wherein the circuit part includes a conversion circuit configured to convert a DC voltage inputted between the input points (T11, T12) into an AC voltage and outputting the AC voltage between the output points (T21, T22), and a switch circuit electrically connected between the output points (T21, T22), wherein the output terminal part includes a first output terminal and a second output terminal which are electrically connected to the respective output points (T21, T22), and wherein on one surface of the support body, the circuit part, the input terminal part and the output terminal part are mounted, wherein the output terminal part is arranged such that the first output terminal and the second output terminal are adjacent to each other around the circuit part, wherein the input terminal part includes two first input terminals (51,321) electrically connected to a positive electrode of a DC power supply and a second input terminal (52,322) electrically connected to a negative electrode of the DC power supply, and the second input terminal (52,322) is arranged between the two first input terminals (51,321), wherein two snubber capacitors (323, 324) are electrically connected between one of the two first input terminals (51,321) and the second input terminal (52,322), and between the other first input terminal (51,321) and the second input terminal (52,322), respectively. a circuit part; an input terminal part electrically connected to a pair of input points (T11, T12) of the circuit part; an output terminal part electrically connected to a pair of output points (T21, T22) of the circuit part; and a support body configured to support the circuit part, the input terminal part and the output terminal part, wherein the circuit part includes a conversion circuit configured to convert a DC voltage inputted between the input points (T11, T12) into an AC voltage and outputting the AC voltage between the output points (T21, T22), and a switch circuit electrically connected between the output points (T21, T22), wherein the output terminal part includes a first output terminal and a second output terminal which are electrically connected to the respective output points (T21, T22), and wherein on one surface of the support body, the circuit part, the input terminal part and the output terminal part are mounted, wherein the output terminal part is arranged such that the first output terminal and the second output terminal are adjacent to each other around the circuit part, wherein the input terminal part includes two first input terminals (51,321) electrically connected to a positive electrode of a DC power supply and a second input terminal (52,322) electrically connected to a negative electrode of the DC power supply, and the second input terminal (52,322) is arranged between the two first input terminals (51,321), wherein two snubber capacitors (323, 324) are electrically connected between one of the two first input terminals (51,321) and the second input terminal (52,322), and between the other first input terminal (51,321) and the second input terminal (52,322), respectively.