A communication device includes a communication unit configured to communicate with an external communication device, and a first storage unit configured to store, when a phone call or an e-mail is received, information on a caller or a sender of the e-mail. A notification is performed in response to the reception, and a controller determines, when a reply to a first reception performed by a first communication function of the communication unit is not performed and a second reception performed by a second communication function of the communication unit is performed, whether a caller or a sender relating to the second reception is identical to a caller of a sender relating to the first reception in accordance with the information on the caller or the sender stored in the first storage unit. A notification is performed in response to the second reception in accordance with a result of the determination.