This paper describes the experimental studies of propeller blade force during contact between a nozzle propeller and an ice block. The problem of propeller-ice interaction is very important for ice going vessels. At first, the scenario of propeller-ice interaction is suggested. Following this scenario, it is considered that the interaction load consists of four components. They are a force due to ice failure, a hydrodynamic force, a force due to momentum change of ice block mass and a force due to added mass. Four kinds of experiments in water and air were carried out, and the propeller-ice interaction load could be divided into these components. In the second place, using two model propellers, the same experiments were conducted. Each propeller had same geometry and different diameter. The results of experiments with two propellers showed a relation between each components of torque and propeller diameter, so a scale effect of four components could be estimated. Finally, this scaling laws were tried to apply the full-scale propeller concerning propeller-ice interaction, and it showed that ice force on full-scale propeller can be discussed from model experiments.