A syringe drive device 1 includes: a syringe holding section 3; a piston manipulating section 4; and a display section 6. An outer tube 202 of a syringe 201 is detachably held by the syringe holding section 3. A piston 203 of the syringe 201 is detachably engaged with the piston manipulating section 4. The piston manipulating section 4 moves in a direction in response to an operation of operation buttons 8A and 8B, and the piston 203 is thereby moved in a direction where the piston is pushed into or pulled out from the outer tube 202. An internal pressure of a medicinal solution container punctured with an injection needle 204 attached to the outer tube 202 of the syringe 201 is measured and displayed on the display section 6.