The invention provides a power adapter combination including an adapter body and an adapter plug. The adapter body comprises a first casing having an inner space and a receiving recess structure with one side opened through the inner space, a circuit board disposed in the inner space, and a pair of connection terminals electrically connected with the circuit board and partially extending into the receiving recess structure. The adapter plug is detachably engaged into the receiving recess structure and comprises a second casing having a pair of slots thereon and a rear wall having a pair of holes, a bottom plate adapted to be assembled with the second casing, a pair of contact pins of which each has one pivoted end, is placed in one of the slots and is enabled to extend out of said one slot by rotation, and a pair of electrode structures mounted on the bottom plate and electrically connected with the contact pins, respectively. Each electrode structure has a half-pipe portion, wherein the pair of connection terminals are allowed to pass through the pair of holes of the rear wall of the second casing to electrically plug into the pair of half-pipe portions, respectively.