To prevent degradation in the quality of mixed paint obtained by mixing a plurality of types of liquids.

A multi-liquid mixing apparatus has: a stirring space 11 for circulating the plurality of types of liquids; and a stirring member 31 having stirring blades 37 and rotating in the stirring space 11, wherein the stirring blades 37 rotate in the stirring space 11 in a direction crossing the flow direction of the plurality of types of liquids, thereby the plurality of types of liquids are stirred to obtain the mixed paint. The apparatus is equipped with: a probe 50 that is installed in an eccentric position deviated from the rotary center in the stirring member 31 and is rotated integrally with the stirring member 31; and a sensor 51 that detects the position of the probe 50.