Robotic vacuum cleaner for autonomous cleaning of floor surfaces of a room , comprising - a casing which delimits an interior , - a container arranged in the interior of the casing for receiving dirt particles, - a fan arranged in the interior of the casing for generating a suction air flow, - at least one suction mouth arranged on the casing , - a main cleaning unit , and - an auxiliary cleaning unit associated with the main cleaning unit , the suction mouth being connected to the fan, as a result of which dust and dirt particles can be conveyed from the suction mouth to the container, the main cleaning unit comprising a cleaning roller arranged on the casing , a drive train which is arranged in the interior of the casing and has a main motor for driving the cleaning roller, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , the auxiliary cleaning unit comprising an auxiliary cleaning element arranged on the casing , a drive train which is arranged in the interior of the casing and has an auxiliary motor for driving the auxiliary cleaning element, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , characterised by a connecting housing part for connecting the housing part of the main cleaning unit and the housing part of the auxiliary cleaning unit to form a common housing . - a casing which delimits an interior , - a container arranged in the interior of the casing for receiving dirt particles, - a fan arranged in the interior of the casing for generating a suction air flow, - at least one suction mouth arranged on the casing , - a main cleaning unit , and - an auxiliary cleaning unit associated with the main cleaning unit , the suction mouth being connected to the fan, as a result of which dust and dirt particles can be conveyed from the suction mouth to the container, the main cleaning unit comprising a cleaning roller arranged on the casing , a drive train which is arranged in the interior of the casing and has a main motor for driving the cleaning roller, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , the auxiliary cleaning unit comprising an auxiliary cleaning element arranged on the casing , a drive train which is arranged in the interior of the casing and has an auxiliary motor for driving the auxiliary cleaning element, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , characterised by a connecting housing part for connecting the housing part of the main cleaning unit and the housing part of the auxiliary cleaning unit to form a common housing . the suction mouth being connected to the fan, as a result of which dust and dirt particles can be conveyed from the suction mouth to the container, the main cleaning unit comprising a cleaning roller arranged on the casing , a drive train which is arranged in the interior of the casing and has a main motor for driving the cleaning roller, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , the auxiliary cleaning unit comprising an auxiliary cleaning element arranged on the casing , a drive train which is arranged in the interior of the casing and has an auxiliary motor for driving the auxiliary cleaning element, and a housing part arranged in the interior of the casing for at least partially accommodating the drive train , characterised by a connecting housing part for connecting the housing part of the main cleaning unit and the housing part of the auxiliary cleaning unit to form a common housing . <EOS>