An electronic mail communication device may be provided with a receiving device that receives an electronic mail, a sequence map creation device, and an output device. The sequence map creation device may create a sequence map in which correspondent objects corresponding to the correspondents of a series of electronic mails relating to the electronic mail received by the receiving device are arranged along an x direction, and transmission objects indicating from whom and to whom each of the series of electronic mails was transmitted are arranged along a y direction in order of the date and time of communication. The output device may output the sequence map created by the sequence map creation device.