We construct 2 × 2-matrix linear problems with a spectral parameter for the Painlevé equations I-V by means of the degeneration processes from the elliptic linear problem for the Painlevé VI equation. These processes supplement the known degeneration relations between the Painlevé equations with the degeneration scheme for the associated linear problems. The degeneration relations constructed in this paper are based on the trigonometric, rational, and Inozemtsev limits.