Antenna device and communication terminal device

A communication terminal device comprising:

• an antenna coil including a magnetic core having a first main surface and a second main surface and a coil conductor wound around the magnetic core,
• a planar conductor arranged close to the magnetic core, and
• a casing that houses the antenna coil and the planar conductor,
• wherein the coil conductor includes a first conductor portion positioned on a first main surface side of the magnetic core and a second conductor portion positioned on a second main surface side of the magnetic core and arranged at a different position to the first conductor portion when viewed in plan from a direction of the first or second main surface, and
• wherein the antenna coil is arranged so that the first main surface side of the magnetic core is on the planar conductor side and so that the first conductor portion of the coil conductor is closer to an end portion of the planar conductor than the second conductor portion, and the first conductor portion of the coil conductor is bent in a direction toward the planar conductor such that a plane including the first conductor portion is non-parallel to the planar conductor.