PURPOSE: To provide a garbage compacting device which can dehydrate and make compact garbage with no complete touching to the garbage, so as to automatically reduce the bulk of the garbage which is then charged into a container.

CONSTITUTION: A cutting part 4 composed of a stationary blade 4a and a rotary blade 4d is provided in an inlet passage 3, and a compression part in which the rotary shaft 2a of a feed vane 2c is laid horizontally, is laid, and a pump part 5 provided with a rotor 5b coaxial with the rotary shaft 2a is laid on the outlet side, and water is removed from drain holes 7a, 7b, 7c opened to a lower wall 2d, and pump chamber walls 5c, 5d while garbage is fed out from an outlet passage 12 formed in a constriction part 14a by way of a high place (h).