A method for controlling cell reselection of a dual mode terminal supporting Wideband Code Division Multiple Access (WCDMA) and Global System for Mobile communications (GSM), includes determining, when a signal strength of a first cell is less than a predetermined value, whether a condition for access to a second cell is satisfied; determining whether a frequency and a Primary Scrambling Code (PSC) for access to the second cell are blocked; and determining whether the second cell is included in a forbidden location area (LA) list. Then, if the frequency and PSC are not blocked, and if the second cell is not included in the forbidden LA list, the method includes connecting to the second cell. A dual mode terminal to perform the method includes a condition determination unit, a blocking determination unit, an LA determination unit, and a control determination unit.