A decentralized ..∞ controller design for a class of large-scale systems with missing measurements is considered in this paper. The linear discrete-time large-scale system is modeled as interconnection of .. subsystems. The occurrence of missing measurement is assumed to be a Bernoulli distributed sequence with known probability. Sufficient conditions for the existence of decentralized ..∞ controller are derived in terms of linear matrix inequality(LMI), such that the closed-loop system is exponentially stable in the sense of mean square, and a prescribed ..∞ performance is guaranteed. A numerical example is also provided to show the effectiveness of the proposed design approach.