Stoponium search at photon linear collider

In some supersymmetric extensions of the Standard Model fairly light superp artner of t-quark is predicted, which may form bound states (stoponiums) un der certain conditions. We study prospects of search for stoponium at the f uture Photon Linear Collider. It is found that this machine could be the be st machine for discovery and study of these resonances at some scenarios of supersymmetric extension of the Standard Model. In particular, if the hh d ecay channel is dominant stoponium could be observed at the beginning of PL C run with collision energy tuned at the stoponium mass. If this channel is kinematically closed stoponium could be discovered in gg, gamma gamma and ZZ decay channels but higher statistics are needed. Effects of the stoponiu m-Higgs mixing and degeneracy are briefly discussed.