The importance of Quaternary sediments as a lithological setting for landslide development is analyzed in the paper. Landslides on the terraces of the Ibar River, close to Kraljevo and Mataruska Banja, as well as in the alluvial plain of the rivers Juzna Morava and Belica, show that alluvial sediments can have a characteristic of a quasistatic topographical surface. The aim of this paper is to detect the lithological-structural and morphosculptural determinants of landslide development in Quaternary sediments. The case study of landslides in the alluvial sediments of the Belica River and its tributary Slatinski Potok is presented.