A collar structure for pets includes a belt with a first elastic layer, a soft ribbon layer and a second elastic layer, wherein the soft ribbon layer is sandwiched between the first elastic layer and the second elastic layer, and an end of the belt is fixed onto a connector body while the other end of the belt wraps around a target position and penetrates through the connector body such that the other end of the belt can be fixed onto the connector body. Seeing that any one or ones of the first elastic layer, the soft ribbon layer or the second elastic layer is/are made of materials having at least a pesticide or fragrance additive, the collar structure for pets according to the present invention can achieve the effects of disinsection or aroma.
