[Problem] Provided are a connection device in which information transmission cables can be reliably connected to each other while jamming is prevented from occurring in the connection device, and an imaging apparatus provided with the connection device. [Solution] In a connection device 200, as an example, an adapter fixing member 1603 internally has a guide member 50. Inside the guide member 50, there is provided a helical guide copying surface 55 formed in one direction in order to perform an operation in which a projection portion 550 of a connector fixing member 1405 is guided in a manner of gyrating around a central axis CL of a first optical fiber cable FC1 as a first information transmission cable and a second optical fiber cable FC2 as a second information transmission cable, when the connector fixing member 1405 is inserted.
