Abstract: A communication control device that is included in a communication system in which a terminal device communicates a frame free of any transmission source information via a network, in which a detection device having a function of detecting a frame having a specific property, and a function of transmitting first information on the frame having a specific property to the network when the detection device detects a frame having a specific property is connected to the network, and the communication control device includes a control unit that refers to a frame storage unit that stores a frame that is a transmission target output from the terminal device to the network when the control unit determines that the first information has been received from the detection device connected to the network on the basis of information for determining being the first information transmitted by the detection device.