Abstract: A portable darkroom especially adapted for use in connection with the processing of X-ray films is disclosed wherein a circular enclosure, comprising an outer cylindrical housing and an inner rotatable door, for the ingress and egress of a person, is in communication with a known film processor by means of an enclosed tunnel arrangement. An opening in the outer shell when aligned with a similar opening in the rotatable door, enables a person to enter the enclosure and thereafter rotate said door to bring the opening therein into alignment with said tunnel, thus closing the opening in said outer shell, and enabling such person to pass a prepared film through said tunnel into said processor.