CONNECTION STRUCTURE OF ROUND GUTTER

PROBLEM TO BE SOLVED: To connect a round gutter with excellent appearance while a joint to be connected is not seen from the outside, and to easily perform connection sufficient in watertightness and strength using one joint member. SOLUTION: A connection structure of a round gutter is provided with an inner joint 2 of a shape to be approximately and closely attached to an inner surface of a round gutter 1. Locking bent parts 2a to be respectively locked to forward and rear ear parts 1a of the round bar 1 are respectively provided on forward and rear end parts of the inner joint 2, and a projected part 1b is provided on forward and rear upper inner wall surfaces of the round gutter 1, and recessed parts 2b to be engaged with the projected parts 1b are formed on the inner joint 2.