This work has the main aims of the sedimentary instabilities characterization on the flanks of Submarine canyons in the upper slope of the Algarve continental margin (SW Iberian Peninsula). High resolution seismic (Sparker) has been used to carry out a morphometric study. Depth, slope, length, width and area on the canyons and sedimentary instabilities on their flanks have been measured. Six submarine canyons have been studied in the upper slope such as: Fade, Salema, Lagos Superior, Portimao, Meninas-C and Meninas-M. Morphometric features of the sedimentary instabilities are different depending on the sector where they are located (western sector and eastern sector, divided by the Portimao canyon). A recent tectonic activity has been inferred starting from the different morphology of the canyons and the sedimentary instabilities on their flanks in each sector (western and eastern). In addition, Mediterranean Outflow Water (MOW) dynamics could have had influenced on the asymmetry of the canyons flanks and the generation of sedimentary instabilities.