Pressure drop and heat transfer of solid-liquid two-phase flow in which the ratio of diameter of solid particles to that of pipe is large are investigated experimentally. The solid particles used were disc plates. Measurements are made on the velocity of the solid particles, friction factor of the solid-liquid flow, and heat transfer coefficient on the pipe wall. The experimental result indicates that the ratio of mean velocity of the disc particles to that of solid-liquid flow increases with decreasing fraction of volumetric flow rate of the solid particles, and with increasing ratio of the diameter of the particles to that of the pipe. The friction factor and the heat transfer coefficient increase with increasing fraction of the volumetric flow rate of solid particles. The friction factor decreases, but the heat transfer coefficient increases with increasing ratio of diameter of particles to that of the pipe.