Purpose: the blackboard eraser of an electronics is arranged to that whiting is prevented to fall into air by effectively adsorbing the whiting being labeled on blackboard and collecting the whiting adsorbed in a collecting means, it is harmful to the health of Faculty and Students to reduce the whiting of flowing. Construction: the blackboard eraser (1) of electronics includes: a shell (10), has an operating switch (12), a collector (11) and a power supply (14); (31) that one recipient (30) combined with shell (10) and had a storage space (32) and the suction-operated that writes with chalk perforation is formed on the bottom of recipient (30); The rotation that one driving motor (M) connect with a power supply (13), when operating switch (12) operation; The sum that one eraser part (20) is connect with driving motor (M) is maintained on a blackboard with a part perforation (31) projected from chalk suction-operated to brush and adsorb whiting; One suction motor (M') is mounted on collector (11); One suction-operated impeller (34) is connected axially to suction motor (M') and rotation; One dust part (33) is removably mounted on the sum of recipient (10) with a chalk intake section (33a) of the side for being mounted on it, and a dust storage chamber (33b) is for collecting input whiting; One check (non-return) valve (35) is installed at chalk intake section (33a).
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