Abstract: A DC voltage detector, which is configured to detect the presence or absence of a DC voltage in a detection target (21) through bringing a detection electrode (11) provided inside a housing (23) to a vicinity of the detection target (21), includes an AC generation unit (12) configured to generate an AC current corresponding to the DC voltage through changing a capacitance, the AC generation unit (12) being arranged between an inter-electrode stray capacitance (C1) formed between the detection target (21) and the detection electrode (11) and a ground stray capacitance (C2) formed between an internal shield (30) of the housing (23) and a ground.