A processing device (10; 210; 310) that processes a member to be processed by irradiating the member to be processed with a laser, the device comprising: a laser oscillator whose output is no less than 10 W and no greater than 10 kW; the processing device being characterised by the following features: the laser oscillator comprising a laser output section including a plurality of vertical cavity surface-emitting laser elements that output a laser having a wavelength of no greater than 1,070 nm, a substrate on the surface of which the plurality of vertical cavity surface-emitting laser diode chips are arranged in a matrix, and a current control circuit ; a guidance optical system that guides the laser outputted from the laser oscillator ; and a control device that controls the output of the laser oscillator , wherein the current control circuit is configured to connect the plurality of vertical cavity surface-emitting laser elements by a plurality of wires , supply currents to the plurality of vertical cavity surface-emitting laser elements over the wires , control a laser power distribution in the plurality of vertical cavity surface-emitting laser elements by controlling the plurality of vertical cavity surface-emitting laser elements connected by the respective plurality of wires in tandem with each other, and the plurality of wires connected to the plurality of vertical cavity surface-emitting laser diode elements arranged in the matrix are grouped in order from the center of the laser oscillator outward, and the control device is configured to control the currents supplied from the current control circuit to the vertical cavity surface-emitting laser elements , which can shape the profile of the laser as desired. the laser oscillator comprising a laser output section including a plurality of vertical cavity surface-emitting laser elements that output a laser having a wavelength of no greater than 1,070 nm, a substrate on the surface of which the plurality of vertical cavity surface-emitting laser diode chips are arranged in a matrix, and a current control circuit ; a guidance optical system that guides the laser outputted from the laser oscillator ; and a control device that controls the output of the laser oscillator , wherein the current control circuit is configured to connect the plurality of vertical cavity surface-emitting laser elements by a plurality of wires , supply currents to the plurality of vertical cavity surface-emitting laser elements over the wires , control a laser power distribution in the plurality of vertical cavity surface-emitting laser elements by controlling the plurality of vertical cavity surface-emitting laser elements connected by the respective plurality of wires in tandem with each other, and connect the plurality of vertical cavity surface-emitting laser elements by a plurality of wires , supply currents to the plurality of vertical cavity surface-emitting laser elements over the wires , control a laser power distribution in the plurality of vertical cavity surface-emitting laser elements by controlling the plurality of vertical cavity surface-emitting laser elements connected by the respective plurality of wires in tandem with each other, and the plurality of wires connected to the plurality of vertical cavity surface-emitting laser diode elements arranged in the matrix are grouped in order from the center of the laser oscillator outward, and the control device is configured to control the currents supplied from the current control circuit to the vertical cavity surface-emitting laser elements , which can shape the profile of the laser as desired. <EOS>