A communication status output apparatus that is adapted to, when being connected to a second transmission module, output a status of communication between a first transmission module and said second transmission module in a network in which send target information is transmitted sequentially via a plurality of transmission modules (2A-2D) along a predetermined transmission path, the second transmission module being located downstream of the first transmissio an module on the predetermined transmission path, and the send target information being information to be processed by an information processing apparatus or information already processed by the information processing apparatus, the communication status output apparatus comprising: an obtaining unit that is adapted to obtain sending power information corresponding to sending power at the time of sending of send target information from the first transmission module, received signal strength information corresponding to received signal strength at the time of reception of send target information sent from the first transmission module by the second transmission module, and transmission period information corresponding to a transmission period between sending of send target information from the first transmission module and reception of the send target information by the second transmission module; and an output unit that is adapted to output one pair of pieces of sending/receiving information for each piece of send target information in order of transmission, the one pair of pieces of sending/receiving information being composed of the sending power information and the received signal strength information associated with sending/receiving of one piece of send target information between the first transmission module and the second transmission module, wherein, in outputting the pieces of sending/receiving information associated with the one piece of send target information, the output unit is adapted to output the sending power information and the received signal strength information in such a manner that an interval therebetween corresponds to a transmission period between sending of the one piece of send target information from the first transmission module and reception of the one piece of send target information by the second transmission module. an obtaining unit that is adapted to obtain sending power information corresponding to sending power at the time of sending of send target information from the first transmission module, received signal strength information corresponding to received signal strength at the time of reception of send target information sent from the first transmission module by the second transmission module, and transmission period information corresponding to a transmission period between sending of send target information from the first transmission module and reception of the send target information by the second transmission module; and an output unit that is adapted to output one pair of pieces of sending/receiving information for each piece of send target information in order of transmission, the one pair of pieces of sending/receiving information being composed of the sending power information and the received signal strength information associated with sending/receiving of one piece of send target information between the first transmission module and the second transmission module, wherein, in outputting the pieces of sending/receiving information associated with the one piece of send target information, the output unit is adapted to output the sending power information and the received signal strength information in such a manner that an interval therebetween corresponds to a transmission period between sending of the one piece of send target information from the first transmission module and reception of the one piece of send target information by the second transmission module.