Abstract: An ostomy bag cover for an ostomy bag of the type having an inlet, a connecting member for connecting the inlet in communication with a stoma on a wearer's body and a closable outlet at the bottom of the ostomy bag for emptying the contents therefrom. The cover is in the form of a hollow body and includes a ribbed aperture formed therein adapted to be disposed in close tolerance with the inlet of the ostomy bag and to receive the connecting member therethrough. Said ribbed aperture provides an improved fit of the ostomy bag cover in relation to the ostomy bag inlet thereby providing the wearer with greater comfort by reduced contact of the wearer's skin with the ostomy bag, the connecting member, or the ostomy inlet. A second aperture is formed in the bottom of the hollow body between spaced side portions thereof and is adapted to be disposed in proximity with the outlet of the ostomy bag. A releasable fastener is mounted on the space sides for releasably closing the second aperture in the hollow body.