A portable telephone terminal with toll number retrieval function which enable either corresponding name of municipalities or toll number to be retrieved to telephone number or to name of municipalities respectively. The portable telephone terminal is provided with a state discrimination means for discriminating whether an information inputted from an input means is a toll number or a name of municipalities in accordance with a mode which is set either a dialing mode or a character input mode, a storage section for storing therein data of name of municipalities and toll number, a retrieval means when the toll number is inputted, retrieving name of municipalities from the storage section, while when the name of municipalities is inputted, retrieving a toll number from the storage section, and a display means for displaying data which is retrieved.