Yes, you will need a head ... which attaches to the camera. For my Nikon D-80, the head attachment screws into the threaded hole on the bottom of the camera. The head lets you quickly slide the camera on and off the monopole.
(There is no screw on the top of the monopole to mate with a camera; thus you need the little head attachment.)
Hi Jim! Thanks for your answer. But I can't buy the monopod as I live in France, and they won't deliver it to me. So I had to buy in from elsewhere. Have a nice day. Christine