Based on the firing patterns of the nonidentical coupled HindmarshRose neuronal system without timedelay,we numerically studied the effect of timedelay on the bursting patterns when the coupled HindmarshRose neurons obtained almost complete synchronization.The results show that the timedelay makes the firing pattern change, compared with the case without timedelay,and makes the spikes within per busting gradually decrease or almost disappear with the values of delay increasing.The results will help us better understand the important effect of timedelay on the behavior of the coupled neural systems.