A rotary connector device comprising: a first rotating member including a first connecting portion and a first cylindrical part, the first rotating member being configured to be mounted such that the first rotating member is rotated integrally with an insert inserted in the cylindrical part; a second rotating member including a first connecting object portion connectable with the first connecting portion, the second rotating member being mounted to the first rotating member such that the second rotating member is rotated integrally with the first rotating member; and a fixed member including a second cylindrical part, the fixed member being mounted such that the fixed member does not follow rotation of the insert inserted in the second cylindrical part and such that the fixed member is in contact with the second rotating member, wherein the fixed member includes: a first fixed member including a second connecting portion 48), the first fixed member being configured to be mounted such that the first fixed member does not follow rotation of the insert; and a second fixed member including a second connecting object portion 49) connectable with the second connecting portion, the second fixed member being mounted to the first fixed member such that the second fixed member is not rotated relative to the first fixed member and being arranged such that the second fixed member is in contact with the first rotating member; and further comprising a flexible flat cable connected between a first connector connected to a wiring harness at a vehicle body side and a second connector connected to cables extending from an electrical component included in the insert, wherein the first connecting portion and the first connecting object portion are fixed to each other by fitting of one of them into the other, and the second connecting portion and the second connecting object portion are fixed to each other by fitting of one of them into the other, characterized in that the first rotating member including the first connecting portion and the second rotating member including the first connecting object portion are formed of polybutylene terephthalate; that the first fixed member including the second connecting portion is formed of polyacetal, and that the second fixed member including the second connecting object portion is formed of polybutylene terephthalate. a first rotating member including a first connecting portion and a first cylindrical part, the first rotating member being configured to be mounted such that the first rotating member is rotated integrally with an insert inserted in the cylindrical part; a second rotating member including a first connecting object portion connectable with the first connecting portion, the second rotating member being mounted to the first rotating member such that the second rotating member is rotated integrally with the first rotating member; and a fixed member including a second cylindrical part, the fixed member being mounted such that the fixed member does not follow rotation of the insert inserted in the second cylindrical part and such that the fixed member is in contact with the second rotating member, wherein the fixed member includes: a first fixed member including a second connecting portion 48), the first fixed member being configured to be mounted such that the first fixed member does not follow rotation of the insert; and a second fixed member including a second connecting object portion 49) connectable with the second connecting portion, the second fixed member being mounted to the first fixed member such that the second fixed member is not rotated relative to the first fixed member and being arranged such that the second fixed member is in contact with the first rotating member; a first fixed member including a second connecting portion 48), the first fixed member being configured to be mounted such that the first fixed member does not follow rotation of the insert; and a second fixed member including a second connecting object portion 49) connectable with the second connecting portion, the second fixed member being mounted to the first fixed member such that the second fixed member is not rotated relative to the first fixed member and being arranged such that the second fixed member is in contact with the first rotating member; and further comprising a flexible flat cable connected between a first connector connected to a wiring harness at a vehicle body side and a second connector connected to cables extending from an electrical component included in the insert, wherein the first connecting portion and the first connecting object portion are fixed to each other by fitting of one of them into the other, and the second connecting portion and the second connecting object portion are fixed to each other by fitting of one of them into the other, characterized in that the first rotating member including the first connecting portion and the second rotating member including the first connecting object portion are formed of polybutylene terephthalate; that the first fixed member including the second connecting portion is formed of polyacetal, and that the second fixed member including the second connecting object portion is formed of polybutylene terephthalate.