PURPOSE: To provide a linkage device for linear or rotative movement which occupies a small volume, can reduce the possibility of the breakage of the jack and, further, can employ a small size jack.
CONSTITUTION: A linkage device which has linking members 1 and 2 constituting the linkage for linear or rotative movement acts directly on a linkage axle 3 and comprises at least one jack 4 and a chain or cable 5 guided between the linkage axle 3 and a gear, pulley or sheave 6. The jack 4 is interlocked with the chain or cable 5 and the linkage axle 3 which is fixed to one of the linking members 1 and 2 and the other linking member 1 or 2 is fitted to the linkage device. With this constitution, a linkage device for linear or rotative movement which occupies a small volume, can reduce the possibility of the breakage of the jack and can employ the small size jack can be obtained.