The present invention relates to a fog spray type fumigation sterilizer including a novel semiautomatic compression type liquid medicine supply means which can increase the efficiency of fog spray and remarkably contribute to the operability of a smokescreen and the performance improvement thereof by semiautomatically supplying by compression a liquid medicine required during the smokescreen for fumigation. That is the present invention is configured by: respectively installing a liquid medicine container (610) having a smokescreen disinfecting solution contained therein and a fog fluid container (620) having on one side a fog generation solution contained therein and the other side respectively separated in half on the lower part of a body case (400) and in each of the respective liquid medicine container (610) and the fog fluid container (620) providing semiautomatic liquid discharging compressors (630 630 ) for allowing the inside liquid to be sprayed semiautomatically in a continuous manner by being pushed out to upper discharge holes (632 632 ) when certain amount of compression is generated by pumping a piston lever (631) several times.
