conductive pin is smoothly slidingly in the through hole, it is possible to carry out uniformly and efficiently heated tips of the plurality of conductive pins are sufficiently follow the irregular object to be heated, that damage to the conductive pins and the heated object is to provide a heating apparatus and a heating method is prevented. a heating apparatus 100 for heating by placing the object to be heated M between opposing electrodes 101, at least one of the electrodes 101, a plurality of conductive pins that are supported by the electrode plate 120 110 having a holding means 130 for holding while being slidingly in a direction away from the opposite electrode 102, and a releasing means 140 for releasing the retention of the plurality of conductive pins 110 by the holding means 130.導電性ピンが貫通孔内を円滑に褶動して、複数の導電性ピンの先端が不定形な被加熱物に充分に倣って均一に効率良く加熱を行うことが可能であり、導電性ピンや被加熱物の損傷が防止される加熱装置および加熱方法を提供すること。 対向する電極101、102の間に被加熱物Mを配置して加熱する加熱装置100であって、少なくとも一方の電極101が、電極プレート120に支持された複数の導電性ピン110を対向する電極102から離れる方向に褶動させた状態で保持する保持手段130と、該保持手段130による複数の導電性ピン110の保持を解除する解除手段140とを有すること。