In　this　paper　we　are　concerned　with　the　mean-square　exponential　stabilization　of　continuous-time　hybrid　stochastic　differential　equations　(also　known　as　stochastic　differential　equations　with　the　Markovian　switching)　by　discrete-time　feed　back　controls.　Although　the　stabilization　by　continuous-time　feedback　controls　for　such　equations　has　been　discussed　by　several　authors　(see　e.g.　Ji　and　Chizeck　(1990);　Mao,　Lam,　and　Huang　(2008);　Mao,　Yin,　and　Yuan　(2007);　Wu,　Shi,　and　Gao　(2010);　Wu,　Su,　and　Shi　(2012)),　there　is　so　far　no　result　on　the　stabilization　by　discrete-time　feedback　controls.　Our　aim　here　is　to　initiate　the　study　in　this　area　by　establishing　some　new　results.　2013　Elsevier　Ltd.　All　rights　reserved.