Clustering of AGNs is regarded as one of the main observational constraints for AGN triggering mechanisms and gas accretion timescales. We investigate clustering properties of AGNs using our latest semi-analytic model of galaxy and AGN formation. We find that the two-point correlation predicted by our model is in agreement with observations. At z <~ 1, the AGN bias of low luminosity AGNs is higher than that of luminous AGNs, while the opposite trend is seen at higher redshifts. The result suggests the negative luminosity dependence of the AGN clustering at low redshift. In our model, minor mergers are the main triggering mechanism of AGN and contribute the AGN clustering predominantly. We also discuss the contribution of satellite AGNs to the AGN clustering.