A contactless power transmission device , by which power is to be transmitted to a power reception device in a contactless manner, the contactless power transmission device comprising: a shield case which has an opening portion at one end portion thereof and is configured for the power reception device to be inserted thereinto through the opening portion ; a power transmission circuit which is for transmitting power and is disposed in the shield case ; a power transmission coil which is disposed on the inner side in the shield case when viewed from the opening portion , and transmits AC power from the power transmission circuit to the power reception device ; characterized in that : the shield case has a notch which is formed on side surfaces of the shield case , from edges of the opening portion toward the inner side such that both sides of a rear end portion of the power reception device in an insertion direction (X) is positioned further on the inner side than the opening portion and a part of the rear end portion is exposed through the notch , for allowing the power reception device to be easily extracted from the shield case by the rear end portion being held by fingers from both sides of the notch ; and the power transmission coil faces the opening portion and is disposed so as to be orthogonal to an insertion direction (X) of the power reception device . a shield case which has an opening portion at one end portion thereof and is configured for the power reception device to be inserted thereinto through the opening portion ; a power transmission circuit which is for transmitting power and is disposed in the shield case ; a power transmission coil which is disposed on the inner side in the shield case when viewed from the opening portion , and transmits AC power from the power transmission circuit to the power reception device ; characterized in that : the shield case has a notch which is formed on side surfaces of the shield case , from edges of the opening portion toward the inner side such that both sides of a rear end portion of the power reception device in an insertion direction (X) is positioned further on the inner side than the opening portion and a part of the rear end portion is exposed through the notch , for allowing the power reception device to be easily extracted from the shield case by the rear end portion being held by fingers from both sides of the notch ; and the power transmission coil faces the opening portion and is disposed so as to be orthogonal to an insertion direction (X) of the power reception device . the shield case has a notch which is formed on side surfaces of the shield case , from edges of the opening portion toward the inner side such that both sides of a rear end portion of the power reception device in an insertion direction (X) is positioned further on the inner side than the opening portion and a part of the rear end portion is exposed through the notch , for allowing the power reception device to be easily extracted from the shield case by the rear end portion being held by fingers from both sides of the notch ; and the power transmission coil faces the opening portion and is disposed so as to be orthogonal to an insertion direction (X) of the power reception device . <EOS>