A catheter device according to one aspect of the present invention includes a tube that is inserted into the body, and a light emitting unit that is provided on the distal end side of the tube and that emits infrared light for confirming the position of the tube. The light emitting portion is mounted on the base material, a base material extending in the extension direction of the tube, a first infrared light emitting element mounted on the base material and having an optical axis in a first direction orthogonal to the extension direction, It has an optical axis in a second direction orthogonal to the extending direction and different from the first direction, and has a first infrared emitting element and a second infrared emitting element juxtaposed in the extending direction. With such a configuration, the position of the tube can be accurately detected without making the distal end portion of the tube of the catheter device unnecessarily thick.本発明の一態様に係るカテーテル装置は、体内に挿入されるチューブと、チューブの先端側に設けられ、チューブの位置確認のための赤外線光を放出する発光部と、を備える。発光部は、チューブの延出方向に延在する基材と、基材に実装され、延出方向と直交する第１方向に光軸を有する第１赤外線発光素子と、基材に実装され、延出方向と直交し第１方向とは異なる第２方向に光軸を有し、第１赤外線発光素子と延出方向に並置された第２赤外線発光素子と、を有する。かかる構成を備えるため、カテーテル装置のチューブの先端部を必要以上に太くすることなく、チューブの位置を的確に検出することができる。
