A method for reading code symbols by deinterleaving to decode an encoder packet for a receiver in a mobile communication system supporting interleaving, wherein an interleaved encoder packet has (2 m x (J-1)+R) symbols, a bit shift value m, an up-limit value J and a remainder R, where 2 m is the integer number of rows, J is the integer number of columns and R is the integer number of symbols in the last column of the 2 m x J matrix, the method comprising the steps of: generating an interim address using bit reversal order operation on a code symbol index by supposing the R=0 in case R < 2 m-1 IA k = J − 1. BRO m k mod 2 m + ⌊ k / 2 m ⌋, and generating the interim address by supposing the R=2 m in case R≥2 m-1 IA k = J. BRO m k mod 2 m + ⌊ k / 2 m ⌋ calculating an address compensation factor for compensating the interim address in consideration of the remainder R of the last column; wherein the address compensation factor calculation step comprises the step of calculating the address compensation factor by the following equation: when the last column is less than a half of 2 m code symbols; C d + r k = ⌊ r k + d − r + + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be inserted, "r+" is an index of a row where a first inserted code symbol is located among the remaining code symbols inserted in the last column, and "+" in an address compensation factor C d +; indicates that a code symbol is "inserted" in the last column; and when the last column is more than a half of 2 m code symbols; C d − r k = ⌊ r k + d − r − + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be excluded, "r-" is an index of a row where a first excluded code symbol is located, and "-" in C d −; in indicates that a code symbol is "excluded" from the last column. generating an interim address using bit reversal order operation on a code symbol index by supposing the R=0 in case R < 2 m-1 IA k = J − 1. BRO m k mod 2 m + ⌊ k / 2 m ⌋, and generating the interim address by supposing the R=2 m in case R≥2 m-1 IA k = J. BRO m k mod 2 m + ⌊ k / 2 m ⌋ calculating an address compensation factor for compensating the interim address in consideration of the remainder R of the last column; wherein the address compensation factor calculation step comprises the step of calculating the address compensation factor by the following equation: when the last column is less than a half of 2 m code symbols; C d + r k = ⌊ r k + d − r + + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be inserted, "r+" is an index of a row where a first inserted code symbol is located among the remaining code symbols inserted in the last column, and "+" in an address compensation factor C d +; indicates that a code symbol is "inserted" in the last column; and when the last column is more than a half of 2 m code symbols; C d − r k = ⌊ r k + d − r − + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be excluded, "r-" is an index of a row where a first excluded code symbol is located, and "-" in C d −; in indicates that a code symbol is "excluded" from the last column. when the last column is less than a half of 2 m code symbols; C d + r k = ⌊ r k + d − r + + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be inserted, "r+" is an index of a row where a first inserted code symbol is located among the remaining code symbols inserted in the last column, and "+" in an address compensation factor C d +; indicates that a code symbol is "inserted" in the last column; and when the last column is more than a half of 2 m code symbols; C d − r k = ⌊ r k + d − r − + 1 d ⌋ where "d" is a value determined by dividing the total number of rows by the number of code symbols to be excluded, "r-" is an index of a row where a first excluded code symbol is located, and "-" in C d −; in indicates that a code symbol is "excluded" from the last column.