Provided are an image sensor and an endoscope that can satisfy the required voltage of the image sensor even when the length of the signal cable changes. The image sensor 20 includes a pixel unit 21 in which a plurality of pixels that generate and output an electrical signal corresponding to the amount of received light are arranged in a two-dimensional matrix, and an A / A that generates and outputs a digital electrical signal to the outside. The D conversion unit 27, the switching unit 26 that can connect the connection destination of the A / D conversion unit 27 to the pixel unit 21 or the transmission lines T1 to T3, and the transmission lines T1 to T3 and the A / D conversion unit at a predetermined timing. And a timing generation unit 24 that causes the A / D conversion unit 27 to output the voltage value of the driving power to the outside by controlling the switching unit 26 to be connected to the A / D converter 27. 信号ケーブルの長さが変化した場合であっても、撮像素子の要求電圧を満たすことができる撮像素子および内視鏡を提供する。撮像素子２０は、受光量に応じた電気信号を生成して出力する複数の画素が二次元マトリクス状に配置されている画素部２１と、デジタルの電気信号を生成して外部へ出力するＡ／Ｄ変換部２７と、Ａ／Ｄ変換部２７の接続先を、画素部２１または伝送線Ｔ１～Ｔ３に接続可能な切替部２６と、所定のタイミングで伝送線Ｔ１～Ｔ３とＡ／Ｄ変換部２７とが接続されるように切替部２６を制御することによって、Ａ／Ｄ変換部２７に駆動電力の電圧値を外部へ出力させるタイミング生成部２４と、を備える。
