The present invention concerns a solar tracker (1000) comprising at least: a mobile device (1100) comprising at least: a table (1110) comprising at least one solar energy collector device (1112); a support structure (1120); first support arch (1130) and a second support arch (1150) configured to support the support structure (1120); a first ground support (1140) and a second ground support (1160) configured to support the first support arch (1130) and the second support arch (1150), respectively; a kinematic drive device (1141); the solar tracker (1000) being characterized in that: the support structure (1120) is a beam formed of a lattice structure comprising: at least one first, one second and one third longitudinal members; a plurality of crossmembers; a plurality of tie rods (1225).