PROBLEM TO BE SOLVED: To stably obtain uniform droplets 21 and embolus particles 25 in large quantities.SOLUTION: A device for forming droplets 1 is provided which includes: a dispersed-phase outlet 101a through which a dispersed-phase material 2, such as an aqueous gelatin solution, is discharged continuous-phase outlets 111a and 121a through which a continuous-phase material 3, such as oil, is discharged a confluence part 131 which communicates with the dispersed-phase outlet 101a and the continuous-phase outlets 111a and 121a and in which the dispersed-phase material 2 is caused to flow into the liquid of the continuous-phase material 3 at a given static pressure and a droplet formation part 132 which is disposed on the downstream side of the confluence part 131 and in which the dispersed-phase material 2 is allowed to become droplets by means of cohesive force.COPYRIGHT: (C)2012,JPO&INPIT【課題】均一な液滴21や塞栓粒子25を安定して大量に得ることができる。【解決手段】液滴生成器1は、ゼラチン水溶液等の分散相材2を流出する分散相流出口101aと、オイル等の連続相材3を流出する連続相流出口111a・121aと、分散相流出口101a及び連続相流出口111a・121aに連通され、分散相材2を連続相材3の液中に一定の静圧下で流動させる合流部131と、合流部131の下流側に配置され、分散相材2を凝集力により液滴化する液滴生成部132とを有している。【選択図】図1