An interproximal squirt brush includes a squeezable bottle having a solution cavity for containing a washing solution and a nozzle head having an opening, and a brush head including a brush arm and a brush member. The brush arm has a brush portion and a resilient portion slidably inserted into the opening of the squeezable bottle for providing an urging force against an inner wall of the nozzle head, wherein a dispensing channel is formed between the resilient portion of the brush arm and the inner wall of the nozzle head for allowing the washing solution to pass therethrough. The brush member is provided at the brush portion of the brush arm. Therefore, when a squeezing force is applied on the squeezable bottle, the washing solution is released to the brush member through the dispensing channel of the nozzle head.