The selection of high yielding varieties with good stability‏ ‏is an important objective in rice breeding ‎programs. The grain yield of eight rice lines with a check (Nemat) were compared‎‏ ‏on six locations of Gilan ‎and Mazandaran provinces during two years, using RCBD with four replications. Combined analysis of ‎variance showed that the effect of variety and year ‎‏×‏‎ location ‎‏×‏‎ variety interaction were significant. Nine ‎stability analysis methods were used in this research. Line No. 7 with environmental variance method‎‏ ‏and ‎Line No. 1 with four stability methods (such as coefficient of variability of environment, wricke’s equivalence, ‎Shukla’s stability variance and coefficient of determination) were most stable lines. The line No. 5 based on ‎within location variance and within location C.V. parameters and Line No. 4 using coefficient of regression of ‎mean yield on environmental index and variance of deviation from linear regression, were known as the most ‎stable lines. Consequently, lines No. 7, 1, 5 and 4 were the most stable ones using different methods. In this ‎research, Lines No. 4, 1 and 5 were selected because of high yield and stability. However, because of the ‎desired grain quality and morphological traits, line No. 4 was‏ ‏released as a new rice variety (Kadus) by the ‎Agricultural Research and Education Organization in 2004.‎