A powdery/granular material flowability evaluation apparatus and a powdery/granular material flowability evaluation method are provided to evaluate the flowability of a powdery/granular material in a dynamic state of the powdery/granular material. The powdery/granular material flowability evaluation apparatus (A) has a hopper (111) for storing a powdery/granular material to be measured, a vertical tube (11) having a flow-in port (1121) connected with a discharge port (1112) of the hopper (111) through which the powdery/granular material is discharged, a vibrator (2) for giving vibration to the tube (11), a laser vibrometer (3) for measuring the amplitude of the tube (11), an electric balance (4) for measuring the weight of the powdery/granular material fallen through the tube 11 from the hopper (111), and an evaluation value calculating section (512) for calculating an evaluation value evaluating the flowability of the powdery/granular material based on the measured amplitude and weight.