It is described a urine collection device for horses which is suitable for mounting on a special harness of horse and which substantive part is the head part (10). The device consists of the part (9) that cathes the urine, the head part (10) and collect sack (8). The head part (10) and the part (9) that cathes the urine are inconnected by a detachable connection (15). This special harness of horse with urine collection device offers good flexibility and is comfortable to wear for the horse. The freedom of movement of the horse is not significantly reduced by the harness, so that grazing is possible.It is described a urine collection device for horses which is suitable for mounting on a special harness of horse and which substantive part is the head part (10). The device consists of the part (9) that cathes the urine, the head part (10) and collect sack (8). The head part (10) and the part (9) that cathes the urine are inconnected by a detachable connection (15). This special harness of horse with urine collection device offers good flexibility and is comfortable to wear for the horse. The freedom of movement of the horse is not significantly reduced by the harness, so that grazing is possible.