The present invention relates to a back-mounted apparatus for spraying ultrafine particles. According to the present invention, the apparatus comprises: a back plate frame (28) which includes a harness (29) to be hung on shoulders for allowing the apparatus to be carried on the back of a user, and includes a chemical solution container (70) disposed at an upper side thereof a DC motor (10a) which is mounted at a lower part of the chemical solution container (70) to rotate a blower (20) a lithium battery (30) which supplies electricity to the DC motor (10a) in a reliable manner a static electricity generator (62) which uses the lithium battery (30) as a power source a blast pipe (30) which is connected to the blower (20) to eject high-pressure air currents a static ring (61) which is mounted on the inner circumference of a front end of the blast pipe (22), and works in connection with the static electricity generator (62) and a switch (63) which controls the static electricity generator (62). Through the above configuration, the apparatus of the present invention ejects powerful blowing air currents, thereby spraying a chemical solution in the state of ultrafine particles, and since the static ring (61) made of material having good conductivity such as copper is installed on the inner circumference of the front end of the blast pipe (22) and works in connection with the static electricity generator (62), the chemical solution sprayed in the state of ultrafine particles is statically charged at the end of the blast pipe (22) and sprayed under high pressure to reliably attach to the surface of fruits or crops, or livestock in a cattle shed, a hen house or a pig pen, or various harmful insects and bacteria to control the same. Thus, the control efficiency is maximized.COPYRIGHT KIPO 2018본 발명은 배부식 초미립자 살포기에 관한 것이다.구성에 있어서, 등에 질 수 있도록 어께에 메는 멜빵(29)이 구비되고 상측에 약제통(70)이 장착된 등판프레임(28)과, 상기 약제통(70) 하부에 장착되어 송풍기(20)를 회전시키는 DC모터(10a) 및 상기 DC모터(10a)에 안정적으로 전기를 공급하는 리튬배터리(30)와, 상기
