In this paper we fully calculate the non-Gaussianity of primordial curvature perturbation of island universe by using the second order perturbation equation .
We find that for the spectral index n _ { s } \simeq 0.96 , which is favored by current observations , the non-Gaussianity level f _ { NL } seen in island will generally lie between 30 \sim 60 , which may be tested by the coming observations .
In the landscape , the island universe is one of anthropically acceptable cosmological histories .
Thus the results obtained in some sense means the coming observations , especially the measurement of non-Gaussianity , will be significant to make clear how our position in the landscape is populated .