PROBLEM TO BE SOLVED: To improve determination accuracy for determining drowsiness.SOLUTION: A drowsiness determination program causes a computer to execute processing to extract a first blood pressure component by frequency-analyzing a time change in a pulse interval calculated from a pulse wave signal of a subject output from a pulse sensor, extract a second blood pressure component by frequency-analyzing a time change in a pulse amplitude calculated by the pulse wave signal, and determine whether or not the subject is in a state of resisting drowsiness based on the variation of the magnitude of deviation between the first blood pressure component and the second blood pressure component.SELECTED DRAWING: Figure 1
