CaSO₄:Pr, CaSO₄:Mn and CaSO₄:Mn,Pr thermoluminescence (TL) phosphors have been prepared and their TL glow curves and TL emission spectra are recorded. TL emission bands at 360, 440,490 and 610nm were observed for CaSO₄:Pr in the scanned range. Co-doping of Mn in CaSO₄:Pr enhances its TL sensitivity. TL sensitivity of CaSO₄:Mn,Pr (0.5, 0.1mol%)is about 47 times that of CaSO₄:Pr (0.1mol%). TL emission band at 500nm was observed for CaSO₄ doped with Mn. TL emission of 220^◦C TL peak in CaSO₄:Mn,Pr consists predominantly of 500nm band. The presence of Mn²⁺ emission in 220°C peak in CaSO₄:Mn,Pr is because of transfer of electron-hole recombination energy to Mn²⁺ions during TL readout. The presence of weak Pr³⁺ emission, along with Mn²⁺ emission, indicates that Pr³⁺ ions compete in absorbing the electron–hole recombination energy.