Abstract: Disclosed are a composition for reducing flow-resistance of hot water in a tubular container principally comprising a combination of surfactant component and micelle structure stabilizer component in which the surfactant component can form linear micelles and the stabilizer component can stabilize structure of the micelle formed, and a process for efficiently reducing flow-resistance of hot water using said composition. Accordingly, the present invention provides the composition for reducing flow-resistance of hot water in the tubular container produced combining alkylamine oxide based surfactant and, optionally, a secondary surfactant, with various amino acids as the micelle structure stabilizer, so that it can maintain in water area at high temperature ranged from 50 to 100° C. and provide efficiency for 50% or more reduction of flow-resistance of turbulent flow in the tubular container.