PROBLEM TO BE SOLVED: To provide a cartilage conduction earphone and a cartilage conduction hearing aid capable of reducing the types of members prepared in advance as well as preventing howling from occurring. SOLUTION: In the cartilage conduction earphone of the present invention, a main body portion 4 to be attached to an ear condyle cavity 101 is provided with a protrusion 5 which fits in an intertragic notch 102. [Selection diagram] Fig. 1【課題】ハウリングが生じにくくなるうえ、予め用意する部材の種類も削減することができる軟骨伝導イヤホン、及び軟骨伝導補聴装置を提供する。【解決手段】本発明の軟骨伝導イヤホンにおいて、耳甲介腔１０１に装着する本体部４は、珠間切痕１０２に収まる突起部５を備える、ことを特徴とする。【選択図】図１
