To provide a power plug and a power code with the power plug detecting abnormal heat generation in the power plug and a plug socket to surely prevent hazards of fire catching and fires and surely taking measures against heat for a heat-sensitive element when manufactured in spite of its simple structure.

The power plug includes a plurality of blades 2, the heat-sensitive elements 3 electrically connected with load side ends of the respective blades 2, and a core 5 containing the load side ends of the blades 2 and the heat-sensitive elements 3.