<p>This paper is aimed to study the effect of silica fume on properties of self-compacting lightweight concrete (SCLC) containing perlite and leca. For this purpose, silica fume has been replaced by different contents. In this study, all mixtures total cementitious materials (cement + silica fume) were kept at 450 kg/m3. Additionally, workability of SCLC mixtures was assessed by means of Slum flow, L-box, U-box, V-funnel and J-ring. This research shows that mixtures without silica fume were not satisfactory. Besides, bleeding and segregation of this mixture were observed. For all tests added the silica fume demonstrated acceptable values. However, for the SCLC mixture containing 15% silica fume significant results were attained.</p>