PURPOSE: To prevent the obstruction by nosocomial infection by working and forming a vinyl full-surface continuous porous sheet and a strut according to the specification of a bed, assembling these members into a fly net form, and connecting it to an ozone generating device with a piping tube.

CONSTITUTION: A full-surface continuous porous or porous pipe is erected on a fly net type strut 3, a vinyl or its substitute sheet is used as a cover sheet 2 on the strut 3, and an ozone generating device is combined thereto to form a medical bed disinfecting unit. The front and rear parts are openable and closable by fasteners 6, and the piping tube of the ozone generating device is connected to an insert hole 4. Since this unit is used by applying the sterilizing force possessed by ozone, it is utilized according to its effective concentration, whereby an obstruction such as nosocomial infection by MSRA through the medical bed can be prevented.