A communication apparatus comprises: a power supply; a communication unit configured to operate by using power from the power supply or a communication partner; an operation unit; a control unit configured to execute software for controlling processing of each unit of the communication apparatus, wherein the control unit starts processing to stop execution of the software if an operation to the operation unit is started while the control unit is executing the software; a power supply control unit configured to control power that is supplied to the control unit, in accordance with a state of as operation with respect to the operation unit; and a disabling unit configured to disable the communication unit, based on the state of the operation with respect to the operation unit and an execution state of the software.