To provide a power outlet to which a sensor can be fitted easily, and which secures an insulation distance between the sensor and a receiving blade.

A pair of plug insertion slots 6, 6 are formed in the front of a cover 4 of an outlet case 2 made of an insulation material, and a through-hole 7 is formed between the plug insertion slots 6, 6. A receiving blade 17 for pinching a blade of a plug is arranged inside the plug insertion slots 6, and a partition 13 is formed between the receiving blades 17, 17. A sensor 16, which is connected to the receiving blades 17 and detects a spark discharge occurring between the blades of the plug, is placed in the partition 13 so as to face the through-hole 7 of the cover 4.