The invention relates to a one-shell suspension arm (1) for a wheel suspension of a motor vehicle, the suspension arm being formed from sheet metal, comprising a first end section (1.1) for connecting to a chassis beam, preferably a rear-axle beam, a second end section (1.2) for the wheel-side connection, and a width-expanded section (1.3) for supporting a spring (2), said width-expanded section being arranged between the two end sections (1.1, 1.2) and defining a trough having flanks (1.31, 1.32) projecting upward. In order to enable optimized wheel suspension by distributing the forces and torques to spatially distanced connection or articulated-connection points while achieving a relatively low component weight and low production costs, a spiral (1.34) is formed as a spring seat in the width-expanded section of the suspension arm, and a connecting section (1.22) for connecting a shock absorber (3) is formed between the spiral (1.34) and the second end section (1.2).