To provide a pressure measuring instrument improved in a difference of pressure transmission speeds of high pressure side and the low pressure side when a static pressure is varied.

The pressure measurement instrument includes:a first pressure receiving part provided with a first groove part on its outer periphery, filled with a first sealing liquid for transmitting a first pressure; a first pressure guiding path communicating a first groove with a pressure detection part and filled with the first sealing liquid; a second pressure receiving part provided with a second groove part on its outer periphery, filled with a second sealing liquid for transmitting a second pressure; and a second pressure guiding path communicating the second groove with the pressure detection part filled with the second sealing liquid. If the amount of the first sealing liquid is larger than the amount of the second sealing liquid, the volume of the first groove part is made characteristically larger than the volume of the second groove part.