The present invention relates to a microcapsule suspension containing (1) an oil core compound having a pesticide active agent dispersed in an oil compound, (2) an aqueous solution containing a polycationic colloid and a polyanionic colloid in a ratio that the polycationic colloid is from 0.02 to 1% by weight and the polyanionic colloid is from 0.02 to 2% by weight, and (3) a pH adjuster.
