A contactless power transfer apparatus comprising: one of a power transmission coil and a power reception coil opposing each other to perform contactless power transfer held in a case, wherein: the power transmission coil or the power reception coil held in the case includes a core (21; 22) and an electric wire, the core having magnetic pole portions at both ends and a wound portion around which the electric wire is wound between the magnetic pole portions, the electric wire being wound around the wound portion of the core; the magnetic pole portions of the core are formed from a pair of parallel magnetic members, the wound portion of the core is formed of a magnetic member which is perpendicular to the magnetic pole portions, and the core is formed in H-shape by the pair of magnetic members constituting the magnetic pole portions and the magnetic member constituting the wound portion; and, with reference to a position of a wide core surface of the wound portion, at a side opposing a counterpart coil, a height of a face of the magnetic pole portions opposing the counterpart coil of the core is equal to or greater than a height of an outer circumference of the electric wire wound around the wound portion, and at a side not opposing the counterpart coil, a height of a core face is less than the height of the outer circumference of the electric wire wound around the wound portion a length of a long side of a magnetic pole portion core member is larger than a length of a winding portion in the same direction; characterised in that the power transmission coil or the power reception coil having the core of H-shape is held in the case formed by a resin, the case is fixed to a non-magnetic conductor plate for magnetic screening, a housing is arranged on an opposite face of a face of the non-magnetic conductor plate to which the case is fixed, and at least a capacitor which is connected to the coil in the case in parallel and a rectifying circuit are held in the housing; and the core is disposed on a first surface of the case and formed in H-shape as viewed from a direction perpendicular to the first surface, the case has a case through hole (433; 434) arranged along a center line which divides a spacing between the parallel magnetic pole portions of the core of H-shape into two parts and passed through from the first surface to a second surface which is an opposite of the first surface, the non-magnetic conductor plate has a communicating through hole (62; 63) which overlaps the case through hole, and a lead wire (31; 32) of the electric wire wound around the wound portion of the core is inserted into the case through hole and the communicating through hole to be led into the housing and electrically connected to the capacitor and the rectifying circuit. the power transmission coil or the power reception coil held in the case includes a core (21; 22) and an electric wire, the core having magnetic pole portions at both ends and a wound portion around which the electric wire is wound between the magnetic pole portions, the electric wire being wound around the wound portion of the core; the magnetic pole portions of the core are formed from a pair of parallel magnetic members, the wound portion of the core is formed of a magnetic member which is perpendicular to the magnetic pole portions, and the core is formed in H-shape by the pair of magnetic members constituting the magnetic pole portions and the magnetic member constituting the wound portion; and, with reference to a position of a wide core surface of the wound portion, at a side opposing a counterpart coil, a height of a face of the magnetic pole portions opposing the counterpart coil of the core is equal to or greater than a height of an outer circumference of the electric wire wound around the wound portion, and at a side not opposing the counterpart coil, a height of a core face is less than the height of the outer circumference of the electric wire wound around the wound portion a length of a long side of a magnetic pole portion core member is larger than a length of a winding portion in the same direction; characterised in that the power transmission coil or the power reception coil having the core of H-shape is held in the case formed by a resin, the case is fixed to a non-magnetic conductor plate for magnetic screening, a housing is arranged on an opposite face of a face of the non-magnetic conductor plate to which the case is fixed, and at least a capacitor which is connected to the coil in the case in parallel and a rectifying circuit are held in the housing; and the core is disposed on a first surface of the case and formed in H-shape as viewed from a direction perpendicular to the first surface, the case has a case through hole (433; 434) arranged along a center line which divides a spacing between the parallel magnetic pole portions of the core of H-shape into two parts and passed through from the first surface to a second surface which is an opposite of the first surface, the non-magnetic conductor plate has a communicating through hole (62; 63) which overlaps the case through hole, and a lead wire (31; 32) of the electric wire wound around the wound portion of the core is inserted into the case through hole and the communicating through hole to be led into the housing and electrically connected to the capacitor and the rectifying circuit.