A multiple dwelling house interphone system comprising: a collective entrance machine installed at an entrance of a multiple dwelling house and used for calling and speaking with a dweller by a visitor; and dwelling room master devices installed in individual dwelling units and used for responding to the calling from the collective entrance machine, wherein a plurality of the dwelling room master devices are installed at least in one of the individual dwelling units, and the dwelling room master devices each include an ID information storage section, a calling operation section, and a master device speech control section, the ID information storage section is configured to store a master device ID for identifying the dwelling room master device itself and master device IDs of the dwelling room master devices of other dwelling units, the calling operation section is configured to perform an operation of calling to the other dwelling unit, and the master device speech control section is configured to control a calling and speaking to the dwelling room master device of the other dwelling unit, master device ID information stored in the ID information storage section is associated with a dwelling unit number, and when the calling operation section is operated and the dwelling unit number of a calling destination is input, the master device speech control section of the dwelling room master device of the dwelling unit having the plurality of dwelling room master devices is configured to perform a calling control of obtaining information on the master device ID associated with the dwelling unit number of the calling destination from the ID information storage section, transmitting a call signal to the dwelling room master device having the master device ID, and subsequently forming a speech path when a response operation of the dwelling room master device of the calling destination is performed, and the multiple dwelling house interphone system is configured to allow the calling and speaking to another dwelling unit even in a state where another dwelling room master device of the dwelling unit itself has formed a speech path with a dwelling room master device of another dwelling unit. a collective entrance machine installed at an entrance of a multiple dwelling house and used for calling and speaking with a dweller by a visitor; and dwelling room master devices installed in individual dwelling units and used for responding to the calling from the collective entrance machine, wherein a plurality of the dwelling room master devices are installed at least in one of the individual dwelling units, and the dwelling room master devices each include an ID information storage section, a calling operation section, and a master device speech control section, the ID information storage section is configured to store a master device ID for identifying the dwelling room master device itself and master device IDs of the dwelling room master devices of other dwelling units, the calling operation section is configured to perform an operation of calling to the other dwelling unit, and the master device speech control section is configured to control a calling and speaking to the dwelling room master device of the other dwelling unit, master device ID information stored in the ID information storage section is associated with a dwelling unit number, and when the calling operation section is operated and the dwelling unit number of a calling destination is input, the master device speech control section of the dwelling room master device of the dwelling unit having the plurality of dwelling room master devices is configured to perform a calling control of obtaining information on the master device ID associated with the dwelling unit number of the calling destination from the ID information storage section, transmitting a call signal to the dwelling room master device having the master device ID, and subsequently forming a speech path when a response operation of the dwelling room master device of the calling destination is performed, and the multiple dwelling house interphone system is configured to allow the calling and speaking to another dwelling unit even in a state where another dwelling room master device of the dwelling unit itself has formed a speech path with a dwelling room master device of another dwelling unit.