Disclosed therein is a sampler. The sampler includes: a chamber accommodating a fluid or solid reagent therein and being sealed at both ends with penetrable films a tube joined with the chamber at one side, the tube having a hollow portion therein and a movable bar having a tip which is formed at one end and has a specimen extracting portion, the tip being guided and moved through a hollow portion, the tip being adapted for mixing the specimen extracted by the specimen extracting portion with the reagent so as to form a diluted solution while penetrating through one end of the chamber and adapted for quantitatively discharging out the diluted solution while penetrating through the other end of the chamber.
