Purpose: Roux stasis syndrome is the main complication of a Roux-en-Y gastrojejunostomy. The aim of this study was to compare the occurrence rate of Roux stasis syndrome with the passing of time in a conventional Roux-en-Y gastrojejunostomy and in an uncut Roux-en-Y gastrojejunostomy. Materials and Methods: 50 patients (31 men and 19 women) had a conventional Roux-en-Y reconstruction and 53 patients (35 men and 18 women) had an uncut Roux-en-Y reconstruction. The Roux stasis syndrome was defined by clinical criteria only. The criteria included one of the four following conditions at the time of follow-up: chronic upper abdominal pain, postprandial fullness, persistent nausea, and intermittent vomiting that are worsened by eating. Follow-up after surgery was done in all patients at $7∼12,;13~18,;19~24,;25~30$, and $31∼36$ months. Results: According to the criteria, the Roux stasis syndrome occurred in 40.0$\%$ of the patients at 7$∼$12 months, 33.3$\%$ at $13∼19$ months, $35.3\%$ at $19∼24$ months, $32.0\%$ at $25~30$ months, and $33.3\%$ at $31∼36$ months after a conventional Roux-en-Y operation. The syndrome occurred in $22.6\%$ of the patients at $7∼12$ months, $15.2\%$ at $13∼18$ months, $17.1\%$ at $19∼24$ months, $19.2\%$ at $25∼30$ months, and $20\%$ at $31∼36$ months after an uncut Roux-en-Y reconstruction. Conclusion: In terms of occurrence pattern, only a little variance existed one year after both procedures. Comparing the Roux stasis syndrome in both procedures, the uncut Roux operation had better results than the conventional Roux operation.