Suspension device

A suspension device having a suspension device main body interposed between a vehicle body and a vehicle wheel, and a stroke locking mechanism capable of locking expansion/contraction of the suspension device main body,

• the stroke locking mechanism comprising:
• a tube member coupled to one of the vehicle body and the vehicle wheel;
• a partition wall body fixed inside the tube member so as to divide an interior of the tube member into a first chamber and a second chamber;
• a flow passage that connects the first chamber to the second chamber;
• a valve that is configured to cut off the flow passage during stroke locking;
• and
• a shaft member coupled to the other of the vehicle body and the vehicle wheel and inserted into the first chamber to be capable of advancing and retreating,
• wherein the first chamber is filled with a working fluid, and the working fluid is stored in the second chamber so as to form a reservoir portion.