A multiple dwelling house interphone system comprising: a collective entrance machine installed at an entrance for a visitor to call a dweller; a dwelling room master device installed in each dwelling unit for responding to the call from the visitor by the dweller; and a management master device installed in a manager room to speak with the visitor or the dweller, wherein the multiple dwelling house interphone system is configured to have a reception mode in which a call to any dwelling unit from the collective entrance machine is uniformly transmitted to the management master device, and the management master device includes: a forwarding button that is configured to re-forward a call in the reception mode to an original calling destination; and a forwarding control section that is configured to re-forward the call to the dwelling room master device of a dwelling unit as the original calling destination when the forwarding button is operated in a state where a speech path between the collective entrance machine and the management master device is formed in response to the call forwarded in the reception mode, characterized in that the forwarding control section is configured to disconnect the speech path between the collective entrance machine and the management master device and to form a speech path between the dwelling room master device of a re-forwarding destination and the collective entrance machine without forming a speech path between the dwelling room master device and the management master device, when a response operation is performed by the dwelling room master device to which the call has been re-forwarded. a collective entrance machine installed at an entrance for a visitor to call a dweller; a dwelling room master device installed in each dwelling unit for responding to the call from the visitor by the dweller; and a management master device installed in a manager room to speak with the visitor or the dweller, wherein the multiple dwelling house interphone system is configured to have a reception mode in which a call to any dwelling unit from the collective entrance machine is uniformly transmitted to the management master device, and the management master device includes: a forwarding button that is configured to re-forward a call in the reception mode to an original calling destination; and a forwarding control section that is configured to re-forward the call to the dwelling room master device of a dwelling unit as the original calling destination when the forwarding button is operated in a state where a speech path between the collective entrance machine and the management master device is formed in response to the call forwarded in the reception mode, characterized in that the forwarding control section is configured to disconnect the speech path between the collective entrance machine and the management master device and to form a speech path between the dwelling room master device of a re-forwarding destination and the collective entrance machine without forming a speech path between the dwelling room master device and the management master device, when a response operation is performed by the dwelling room master device to which the call has been re-forwarded. a forwarding button that is configured to re-forward a call in the reception mode to an original calling destination; and a forwarding control section that is configured to re-forward the call to the dwelling room master device of a dwelling unit as the original calling destination when the forwarding button is operated in a state where a speech path between the collective entrance machine and the management master device is formed in response to the call forwarded in the reception mode, characterized in that the forwarding control section is configured to disconnect the speech path between the collective entrance machine and the management master device and to form a speech path between the dwelling room master device of a re-forwarding destination and the collective entrance machine without forming a speech path between the dwelling room master device and the management master device, when a response operation is performed by the dwelling room master device to which the call has been re-forwarded.