The disclosures provides an endoscope device which includes a handle portion including a main circuit board, a clamping portion connected to the handle portion, and an insertion portion connected to the clamping portion and including a lens, an image sensor corresponding to the lens, and a flexible circuit board electrically connected to the image sensor, wherein the lens and the image sensor are located at a distal end of the insertion portion away from the clamping portion, and the flexible circuit board extends from the distal end through the clamping portion to the handle portion and is electrically connected to the main circuit board.