[en] An experimental study of measurement of pressure drop in a tube bundle in a liquid metal reactor intermediate heat exchanger is performed. An experimental facility that can measure the pressure drop according to the angle between tube bundle and flow direction is designed, manufactured and installed, and the pressure drop is measured varying the flow rate and test sections which have different inclined tube angles. Experiments are conducted for five different inclined tube angles (90 .deg., 75 .deg., 60 .deg., 45 .deg., 30 .deg.) in a Reynolds number range of 3000-40000 based on the tube diameter. The measured experimental data show that the dimensionless pressure drop varies negative power of Reynolds number and the magnitude of dimensionless pressure drop increases with the inclined tube angle