A catheter device according to one aspect of the present invention, a tube to be inserted into the body, a light emitting unit provided on the distal end side of the tube, and an infrared light emitting element that emits infrared light for confirming the position of the tube, and Since a power supply line for supplying electric power to the infrared light emitting element and a conduction detecting section having a visible light emitting element for notifying the conduction state of the power supply line and the infrared light emitting element by visible light are provided, light is emitted before inserting the tube. The operation of parts can be visually confirmed.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赤外線発光素子が設けられた発光部と、赤外線発光素子に電力を供給する電源ラインと、電源ラインと赤外線発光素子との導通状態を可視光によって通知する可視光発光素子を有する導通検知部と、を備えるため、チューブを挿入する前に発光部の動作確認を目視で行うことができる。
