Cleaner with detachable controller

A cleaner comprising:

• a main body;
• a suction fan in the main body and configured to generate a suction force for sucking in air;
• a dust collector in the main body and configured to separate foreign substances from the air that was sucked in;
• a filter housing coupled to the main body and configured to be detachable from the main body in a backward direction;
• a filter in the filter housing and configured to filter the air from which foreign substances have been separated by the dust collector;
• and
• a controller including a manipulation unit to receive a manipulation input from a user to control an operation of the cleaner and/or an indication unit to display information about an operating state of the cleaner, wherein
• the controller is located at a rear of the filter housing, and,
• the controller is switchable between a use position and a retreat position in which the controller does not interfere with the filter housing being detached from the main body in the backward direction.