Filler-containing polytetrafluoroethylene granular powder, which has a large apparent density, a small average particle size and a narrow particle size distribution and a superior powder flowability, and gives a molded product having a superior tensile strength, elongation and surface roughness, and a process for preparing the same. The granular powder is granulated by mixing, in water, of a PTFE powder and a filler in the state of slurry in the presence of a surfactant and stirring in the presence of an organic liquid forming liquid-liquid interface with water.