The object is to provide a safe non-contact electric power transmission apparatus reducing unnecessarily consumed electric power, while intermittently-operated or otherwise restrained electric power transmission is not performed, and heat is not generated when a metal such as a foreign object is placed. In a non-contact electric power transmission apparatus having: a power supplying unit 10 main body containing a power supplying coil L1 for non-contact electric power transmission; a power receiving unit 50 containing a power receiving coil L50 for non-contact electric power transmission; and a supporting base 20 for detachably mounting the power receiving unit 50, formed in a portion of the power supplying unit 10 main body, electric power being transmitted from the power supplying coil L1 to the power receiving coil L50 in a non-contact manner using electromagnetic induction, the power receiving unit 50 has a modulation circuit 52 which outputs a recognition signal upon receiving electric power from the power supplying coil L1 at the power receiving coil L50, and the power supplying unit 10 has a electric power transmitting circuit 1, a control circuit 2, detecting means 3, a demodulation circuit 4, a recognition circuit 5, and a timer circuit 6.