The purpose of this study was to investigate the relationship between ( 1) attitude as expressed on Aiken 1s Mathematics Attitude Scale between students who had been taught Unified Mathematics and similar students who had not been taught Unified Mathematics. The sample consisted of 37 students in the treatment group and 46 students in the control group. The students were given a copy of Aiken's Mathematics Attitude Scale. The responses were scored by the researcher. Seven null hypotheses were examined by calculating the means and standard deviations of each group. Comparison of the posttest means was performed by using the z test for each of the relationships stated in seven hypotheses. It was concluded from this study that: 1. The Unified Mathematics program had a less positive effect on the attitudes of the students in the treatment than students in the control group. 2. The Unified Mathematics program had a negative effect on females in the treatment but not on the males in the same group. 3 . The non-Unified Mathematics program did not produce negative attitudes on students as did the Unified Mathematics program. 4. The Unified Mathematics program had no negative effect on the attitudes of male students.