An apparatus and method for generating a scrambling code in a radio communication system is disclosed. In particular, an apparatus and method for generating a scrambling code using a Gold-like sequence even when m is a multiple of 4 for a length 2m−1 of a pseudo-random sequence is disclosed. Two LFSRs (LFSR a and LFSR a′) for generating the Gold-like sequence by two different polynomials of degree m are included. The LFSR a′ is constructed by a reciprocal primitive polynomial of the primitive polynomial of degree m over GF(2) used to construct the LFSR a. In order to generate 2m different scrambling codes, one fixed initial value is input to the LFSR a and different initial values of m bits are input to the LFSR a′ according to system-specific information.