The collapsibility behavior of fine sand is considered one of the serious geotechnical problems facing foundations and constructions. One of the commonly used methods for underlying soil stabilization is compaction. In this study, collapse behavior of compacted fine sand-bentonite mixtures was investigated. Oedometer tests were carried out to study the effect of bentonite content on the collapse settlement of compacted fine sand-bentonite mixture. Samples of fine sand soil were mixed with different amounts of bentonite (0%, 5%, 10%, 15% and 20% by weight of dry fine sand). Maximum dry density (γdmax.) and optimum moisture content (OMC) were determined for each sample. Soil samples were prepared in oedometer ring at various compaction degrees (Ic= 90%, 95% and 100%) and OMC. The collapse potential was determined and investigated under applied pressure of 200 KN/m 2 . The obtained results indicated that, the collapse potential decreases with the increase of bentonite content and compaction degree. Moreover, increasing the compaction effort decreases the risk of fine sand collapsibility.