PURPOSE: To measure the pressure distribution of a living body with only one pressure sensor.

CONSTITUTION: A living body pressure distribution measuring device is provided with a pressure detecting sheet 1 having a number of conductors Z1-Z3, Y1-Y3 arranged in matrix on the inner surface and capable of injecting a fluid into the inner part and discharging it, a scanner 2 for scanning the conductors X1-X3, Y1-Y3 to detect continuity, a pressure sensor 3 for detecting the pressure of the fluid in the pressure detecting sheet 1, a pump 4 for supplying the fluid into the pressure detecting sheet 1, and a discharge valve 5 for discharging the fluid in the pressure detecting sheet 1. Further, this device is provided with a control part 7 for inputting the continued position signals of the conductors X1-X3, Y1-Y3 outputted from the scanner 2 and the pressure signal detected by the pressure sensor 3 at a point of time when the position signal is detected to measure the pressure distribution of the pressure detecting sheet 1, and an output device 7 for recording and/or displaying the pressure distribution outputted from the control part 7.