A numerical controller for laser comprising a laser oscillator (1), a power source (3) for driving the laser oscillator, and a numerical controller (CNC) (5). The numerical controller for laser includes means for controlling the sequence of the laser oscillator, output control means for controlling the output condition of the laser oscillator, feedback control means for the output of the laser oscillator, and indication control means for indicating the condition of the laser oscillator. The numerical controller for laser which is small in size and simple in construction is realized by combining the laser oscillator (1), power source (3) and numerical controller (5) together as a unitary structure.