To provide the installation method for an expansion program for an image pickup device and the image pickup device.

This method is provided with a process (S1) for determining whether or not an execution file for installing the extension program for this image pickup device and the resource file of the execution file are present in a prescribed directory, a process (S2) for determing whether or not the resource file is provided with prescribed information when determining that the execution file and the resource file are present and a process (S10) for starting the installation of the extension program when determining that the resource file is provided with the prescribed information.