Abstract: A chair assembly includes two first side rods, two second side rods connected pivotally and respectively to the first side rods, and a seating unit including a loop frame connected pivotally to top ends of the first and second side rods, at least three first elastic cords each having two opposite ends respectively retained on the loop frame by two first retaining members, and two second cord units each including at least three second elastic cords each having two opposite ends respectively retained on the loop frame by two second retaining members. The first and second elastic cords are interwoven with each other to define a seating area.