Door knobs are generally very simple to remove. You take off a couple of screws, and then pull the door knob off. Some door knobs, however, do not appear to have screws, which can be confusing. These door knobs actually do have screws; they're just not visible. Removing a door knob with no visible screws is a little bit trickier than other door knobs, but once you get the hang of it, it only takes a few minutes.
Examine the door knob closely. Look around the knob to find the thin slot. Insert a small flathead screwdriver (or a paper clip) into the slot to disengage the clip. Pull the door knob off.
Pry the base of the doorknob (called the rose) away from the door. Pull it off and set it aside.
Remove the screws that become visible with the rose removed. Hold on to the door knob on the opposite side of the door, and then pull the door knob shaft off to separate it.
Pull the door knob away from the opposite side of the door. With one side removed, the other side will easily come off.
It doesn't matter what side of the door you start on; one side is has a "male" connection, the other side has a "female" connection. Starting on either side will work just fine.