Micro vaccum air bubble generating device

A micro vacuum air bubble generator is provided to enable micro vacuum air bubbles to be transferred deep into water, and further increase a contact area of the air bubbles with a target liquid by additionally cutting the air bubbles into fine air bubbles. A micro vacuum air bubble generator(10) comprises: a cylindrical pipe(12) having a predetermined inner diameter; a drive unit(14) mounted on a top part of the cylindrical pipe; a rotary shaft(16) directly connected to the drive unit and disposed in the center of the cylindrical pipe; first and second fans(12,22) located within the cylindrical pipe and axially installed on the rotary shaft such that the first and second fans are spaced apart from each other in a predetermined interval; and a nozzle plate(30) disposed in rear of the first fan such that the nozzle plate is spaced apart from the first fan in a predetermined nozzle gap, wherein the nozzle plate has a plurality of finely distributed holes(30a) formed therein.