Abstract: A laser surgical apparatus for performing treatment by irradiating a part to be treated by a variable pulsed laser beam is disclosed. This apparatus includes a laser source which emits variable waveform output of treatment laser beam pulses; a flexible beam delivery for delivering the treatment laser beam emitted from the laser source, the flexible beam delivery includes at the distal end automated optical scanner comprising of 2 moving mirrors; and a surgical instrument is connected to an end of the scanner and used for irradiating the treatment laser beam delivered therein to the treatment part. By having the ability to vary the laser's output pulse frequency, pulse width, and pulse energy, multiple tissue effects can be achieved using one laser surgical apparatus.