We studied on the gelation behavior in a sol-gel reaction of three-functional silanes under various reaction parameters such as solvents, concentration of catalyst, and gelation time. Trimethoxyvinylsilane(TMVS) or Triethoxyvinylsilane(TEVS) was used as a precursor and poly(ethylene oxide-b-propylene oxide-b-ethylene oxide)(EPE) was used as a structure directing agent.