A connection device is disclosed 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. The connection device can include an adapter fixing member internally having a guide member. Inside the guide member, there is provided a helical guide surface formed in one direction in order to perform an operation in which a projection portion of a connector fixing member is guided in a manner of gyrating around a central axis of a first optical fiber cable as a first information transmission cable and a second optical fiber cable as a second information transmission cable, when the connector fixing member is inserted.
