Guido de Castro Ficeclo (died 1147) was Italian Cardinal Deacon of S. Apollinare created by pope Innocent II in 1139. In 1139 he was governor of Benevento. He subscribed the papal bulls between February 17, 1140 and December 27, 1146. From 1142 until 1145 and then in 1145/46 he served as papal legate in Bohemia and Moravia. He participated in the papal election, 1145.