Disclosed are: an irregular-shaped hollow microparticle, which can sufficiently meet high-level requirements in these days for, e.g., improvement in optical characteristics, such as total light transmittance and light diffusing properties, in molded resin articles, and improvement in texture in using, soft-focus effect, persistence and so on in cosmetics a method for producing the same and use of the same. Use is made of an irregular-shaped hollow microparticle having a spindle shape as a whole, wherein a plurality of recesses (21) are formed on the surface (11), the interior (31) is equipped with one hollow part (41), and the surface (11) is connected to the hollow part (41) via a cleavage (51) that is elongated along the direction of the major diameter (L1), characterized in that the average of the major diameter (L1) is 0.1-30 [mu]m and the ratio of the average of the minor diameter (L2) to the average of the major diameter (L1) is 0.3-0.8.本發明提供可充分因應於樹脂成形體中之全光線穿透率及光擴散性等光學特性更加提高,以及於化粧品中之使用感、柔焦性、隱蔽性及持續性等更加提高等之近年所要求的高度化之中空異形微粒子、其製造方法及其用途。本發明係使用表面(11)具有複數之凹部(21),內部(31)具有1個中空部(41),表面(11)與中空部(41)透過沿著長徑(L1)方向之1條裂縫(51)而連接之全體為紡錘形狀的中空異形微粒子,其長徑(L1)的平均值為0.1~30μm,短徑(L2)的平均值/長徑(L1)的平均值=0.3~0.8。11...表面51...裂縫
