A screen generating apparatus includes a reference screen information acquiring portion to acquire reference screen information, the reference screen information including a plurality of components classified into one or more sets and layout information for disposing the components in a reference screen, a screen size acquiring portion to acquire a screen size of a display portion, a set area determining portion to determine, for each of the one or more sets, a converted area corresponding to the set in a display screen, on the basis of the acquired screen size and the layout information included in the reference screen information, and a component disposing portion to dispose the components included in the reference screen information, in the converted areas within the display screen corresponding respectively to the one or more sets, each component being disposed in the same size as that in the reference screen.