An interproximal squirt brush, comprising: a solution container having a compressible solution chamber (11, 11A-11E) for containing a solution, and a nozzle head (12, 12A-12E) having an opening (121, 121A-121E) communicating with said compressible solution chamber (11, 11A-11E); and a brush head (20, 20A-20E), comprising: an elongated brush arm (21, 21A-21E) having a brush portion (211, 211A-211E) and a retention portion (212, 212A-212E) connected to said nozzle head (12, 12A-12E) to hold said brush arm (21, 21A-21E) in position, wherein a dispensing channel is provided at said nozzle head (12, 12A-12E) adjacent to said retention portion (212, 212A-212E) of said brush arm (21, 21A-21E) to deliver said solution from said solution chamber to said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E) through said nozzle head (12, 12A-12E); and a brush member (22, 22A-22E) provided at said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E), thereby when a compression force is applied on said container body, said solution is released to deliver to said brush member (22, 22A-22E) through said dispensing channel of said nozzle head (12, 12A-12E), characterized in that said solution container comprises a container body defining said compressible solution chamber (11, 11A-11E) therein and having an opening portion communicating with said compressible solution chamber (11, 11A-11E), wherein said nozzle head (12, 12A-12E) comprises a tubular nozzle base detachably mounted at said opening portion of said container body and a tubular brush holder coaxially extended from said nozzle base, wherein said retention portion (212, 212A-212E) of said brush arm (21, 21A-21E) is inserted into said brush holder to retain said brush head (20, 20A-20E) in position, wherein length of said retention portion (212, 212A-212E) is longer than that of said brush holder, wherein said retention portion (212, 212A-212E) of said brush arm (21, 21A-21E) is inserted through said brush holder and an outward extending tail of said retention portion (212, 212A-212E) is bent towards said brush portion(211, 211A-211E) to form a U-shape structure at a rear edge end of said brush arm (21, 21A-21E) to securely hold said brush arm (21, 21A-21E) at the brush holder. a solution container having a compressible solution chamber (11, 11A-11E) for containing a solution, and a nozzle head (12, 12A-12E) having an opening (121, 121A-121E) communicating with said compressible solution chamber (11, 11A-11E); and a brush head (20, 20A-20E), comprising: an elongated brush arm (21, 21A-21E) having a brush portion (211, 211A-211E) and a retention portion (212, 212A-212E) connected to said nozzle head (12, 12A-12E) to hold said brush arm (21, 21A-21E) in position, wherein a dispensing channel is provided at said nozzle head (12, 12A-12E) adjacent to said retention portion (212, 212A-212E) of said brush arm (21, 21A-21E) to deliver said solution from said solution chamber to said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E) through said nozzle head (12, 12A-12E); and a brush member (22, 22A-22E) provided at said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E), thereby when a compression force is applied on said container body, said solution is released to deliver to said brush member (22, 22A-22E) through said dispensing channel of said nozzle head (12, 12A-12E), an elongated brush arm (21, 21A-21E) having a brush portion (211, 211A-211E) and a retention portion (212, 212A-212E) connected to said nozzle head (12, 12A-12E) to hold said brush arm (21, 21A-21E) in position, wherein a dispensing channel is provided at said nozzle head (12, 12A-12E) adjacent to said retention portion (212, 212A-212E) of said brush arm (21, 21A-21E) to deliver said solution from said solution chamber to said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E) through said nozzle head (12, 12A-12E); and a brush member (22, 22A-22E) provided at said brush portion (211, 211A-211E) of said brush arm (21, 21A-21E), thereby when a compression force is applied on said container body, said solution is released to deliver to said brush member (22, 22A-22E) through said dispensing channel of said nozzle head (12, 12A-12E),