PROBLEM TO BE SOLVED: To provide a connecting structure of rear cover in covers for rotary, capable of connecting the rear cover to a main cover in such a way that a squeak noise is not generated and a muddy soil or the like is not effused from a hinge mechanism. SOLUTION: In this connecting structure of covers for a rotary 17, the hinge mechanism 27 which connects the main cover 18 for covering the top of the rotary 17 to the rear cover 21 for covering the rear so that the rear cover 21 is freely rotatable to the main cover is composed of cut-off parts 24 formed on both the right and left sides of the front end of the rear cover 21, inserting rods 26 attached horizontally to the inside of the cut-off parts 24, and inserting rod receivers 23 formed on both the right and left sides of the rear end of the main cover 18 to be inserted to fit with inserting rods 26, wherein any one 26a of both the inserting rods is formed to have a margin for the other inserting rods 26b, and a spacer 28 which is made of a elastic material and has a slit 29 on the curved surface is attached to the margin so that the spacer is inserted through the slit into the inserting rod 26a and engaged with the outside of the inserting rod 26a.
