An object of the present invention is to provide an image output device capable of performing a screen switching without causing a user to feel discomfort or anxiety. An in-vehicle image output device 101 receives moving image data from a content storing section 110 via a communication section 102, and the received moving image data is decoded in a decoding section 103. An effect processing controlling section 106 calculates, as an effect processing execution time, a time period required from when an instruction to reproduce the moving image data is received to when the reproduction of the moving image data starts, and causes an effect processed image generating section 107 to generate an image in which a current screen is shifted to a subsequent screen. After displaying the effect processed image, the control section 105 changes an output so as to display an image of the moving image data.