A physiological information display device includes:a display on which a numerical value corresponding to physiological information of a subject is displayed；a memory that stores a program； anda processor that executes the program to change a number of significant digits of the numerical value that is to be displayed on the display.In the device, the numerical value contains a first digit and a second digit, the first digit is always displayed in a first size and in a first area of the display, the number of significant digits is changed depending on whether the second digit is displayed in a second size and in a second area of the display or is not displayed, the second size being smaller than the first size, and a position and size of the first area are not changed even when the second digit is displayed.
