Abstract: A fastening mechanism configured to connect a first member to a second member may have a clamp member having an enclosure for enclosing the first member. The mechanism may also have engagement sheets extending from two side edges of the enclosure. Each engagement sheet may have a first engagement portion. The mechanism may also have a locking member having slots where the engagement sheets of the clamp member may be configured to be inserted through the slots. The mechanism may also have an actuating and tensioning device having a main body portion provided with second engagement portions engaged with the first engagement portions, and a force application mechanism affixed to the main body portion for applying a force on the locking member to shift the relative position between the locking member and the clamp member. A furniture assembly using the fastening mechanism is also provided.