To provide a sludge recovery apparatus which can prevents the deterioration of an environment on the land.

In the sludge recovery apparatus 1 recovering sludge 2 accumulated on a water bottom, the apparatus includes a recovery ship 3 and a recovery machine 4 freely traveling on the water bottom. The recovery ship 3 includes a treatment apparatus 8 generating a treated product while treating the sludge 2 recovered by the recovery machine 4, and the recovery machine 4 includes a transfer means 14 sucking the sludge 2 to transfer it to the processing apparatus 8.