Is there a device that can allow you to connect multiple microphones into a single input for recording?

i have a boss multi track recorder which has only 2 inputs. This means i can only record two different things simultaneously. I am thus looking for a device that would allow me to connect about 5 microphones into a single input or two. Does any such device or connector exist. It should work just like the electrical multiple socket does: which receives about 6 different plugs and feeds them all into one wall socket. Let me know if you know of any such device.