An image generating device is connected to a process executing device that executes a series of processes defined in workflow information on image data, and includes: an image generating unit to generate image data; a workflow selecting unit to select any of pieces of workflow information according to a user's operation; a registration-information acquiring unit to acquire user registration information including information on the user; a specific-value determining unit to determine whether all user-specific values used in execution of a series of processes defined in the selected workflow information are included in the user registration information; and a stop unit to make, if any of the user-specific values is not included in the user registration information, the user unable to manipulate an instruction to execute a series of processes to be executed according to workflow information by using the user-specific value not included.