We report the magnetocaloric effect (MCE) in a Pr _0.52 Sr _0.48 MnO ₃ single crystal. A peak in the temperature dependence of magnetic entropy change (ΔS _M ) with a fairly large negative value (≈3.8 J / kg   K ) is observed at 275 K close to Curie temperature. MCE is spread over a wide temperature range resulting in a considerable refrigerant capacity (≈293 J / kg ) . At low temperature the sign of ΔS _M changes, below which anomalous field dependence of ΔS _M is observed indicating the coexistence of ferromagnetic and antiferromagnetic interactions. Interplay between the interactions is strongly influenced by direction and magnitude of applied magnetic field in the ordered state.