The present invention provides a camera for detecting a driver's drowsiness state, which can increase the number of pixels in an image of a driver's eye even when using an image sensor having the same number of pixels as a conventional camera instead of a high definition camera. The camera of the present invention is, thus, capable of determining whether the driver's eyes are open or closed. The camera for detecting the driver's state according to the present invention includes a cylindrical lens mounted in front of the camera configured so as to enlarge an image in the vertical direction, a convex lens located in the rear of the cylindrical lens, an image sensor for taking an image of a driver's face formed by the cylindrical lens and the convex lens, and an image processor for extracting an eye area from the image of the driver's face and determining whether the driver's eyes are open or closed.