A particle analytical device comprises a light receiving part that receives the scattered light emitted from the particle group and that outputs an electric current signal, a data processing part that processes data based on time series data of a number of pulses obtained by the electric current signal, and a control part that halts a movement of the light receiving part in case that the overcurrent is detected based on the electric current signal and that restarts the movement of the light receiving part after a predetermined time passes and is characterized by that the data processing part holds the time series data until the light receiving part is halted and processes the data after the movement of the light receiving part is restarted by the use of the held time series data and the time series data obtained after the restart.