<p>Disclosed is a device by which multiple doses of a therapeutic solution can be injected while inserting the front end of the device into the pericardial cavity via an access port that is formed by subxiphoid puncture. The device (1) for injecting a therapeutic solution comprises an injection needle (3) for puncturing a living tissue, a tube (6) equipped with said injection needle (3) at the tip end thereof, a syringe-connecting part (5) which is provided in the base end side of said tube (6) for detachably connecting a syringe (4) for therapeutic solution containing the therapeutic solution, and an open-ended three-way valve (8) which is provided in a part of the tube (6) located between said syringe-connecting part (5) and said injection needle (3).</p>
