Direct Methanol Fuel Cell (DMFC) using a polymer electrolyte membrane is a kind of ideal energy source. DMFC has been in the spotlight of a probable application in the portable power source and in the hybrid electrical vehicles. However, the high cost of Pt and the low performance are difficult problems. In this study, the DMFC anode catalysts could be prepared from hydrosols with Pt particle size of 2-3 nm. Pt hydrosols were prepared by various kinds of surfactants. The Pt particles obtained were supported on Vulcan XC-72 as the hydrosols were destabilized by the addition of organic solvent, ethanol. The Pt particle size was not changed after deposition on the support. Pt/C catalyst using SB12 as a surfactant had higher catalytic activity than that using Brij 35. The catalytic activity of the developed Pt/C for methanol oxidation was 134 mA/cm² of maximum current density, which was similar to that of a commercial one.