A silica encapsulating microcapsule resin particle comprises an outer shell composed of a crosslinked polymer, a cavity defined by the outer shell, and a porous structure formed of silica particles connected to each other is contained in the cavity, and the silica encapsulating microcapsule resin particle has a volume average particle diameter of 0.5 to 100 μm.一種內包氧化矽之微膠囊樹脂粒子,係具備由交聯聚合物所構成的外殼、及被前述外殼區隔的空洞,在前述空洞的內部含有氧化矽子粒互相連結而成之多孔質結構體,前述微膠囊樹脂粒子具有0.5至100μm的體積平均粒徑。
