To simply attach a disposer to a sink and lowere the vibration propagated from the disposer by elastically supporting.

A grommet 84 for mounting a clip 85 is provided to the connection bolt 81 which connects the upper flange member 26, connected to the sink, to the lower flange member 28 on the side of a main body casing. A coil spring 89 is mounted between the sprink seat 86 mounted on the lower end of the connection bolt 81 and the clip 85 in a contracted state before the connection bolt 81 is stretched across the upper and lower flange members 26 and 28. After the connection bolt 81 is stretched across the upper and lower flange members 26 and 28, the clip 85 is detached from the grommet 84 and the main body casing is elastically supported on the upper flange member 26 by the coil spring 89.