The dog-washing apparatus is a device that is specially adapted for use with a dog, and which isolates a dog inside of a housing in order to wash said dog. The dog-washing apparatus includes the housing onto which a pair of roof members are hingedly attached. The pair of roof members enclose the housing, and each include at least one glove hole thereon. An entrance into the housing adaptively enables the dog to enter into the housing. A plurality of sprinkler members are positioned inside of the housing and direct a soap and water solution onto the dog. The housing and the pair of roof members are made of a translucent material so as to view the interior of the housing.