An object of the present invention is to provide a musical performance device by which layout information, such as information regarding the arrangement of a virtual musical instrument set, can be quickly and easily changed during musical performance and whereby the variety of musical performance can be increased. In the present invention, a CPU identifies a musical tone associated with a virtual pad in an area where the position coordinates of a marker section are located in an image captured by a camera unit section at a shot timing by a drumstick section, and emits the identified musical tone. When the position coordinates of the marker section in an image captured at a shot timing are within the area of a control pad on a virtual plane, the CPU switches processing target set layout information to other set layout information among a plurality of set layout information.