Polymer laser photochemistry is reviewed. Mechanisms of laser ablation of polymers have been extensively studied. The photolytic/photothermal issue has been one of the targets of hot arguments. Post-ionization analyses of ablated fragments with multi-photon ionization/time-of-flight (TOF) mass spectrometry have been very useful. Laser light has been conveniently utilized in the chemical surface modification of polymers. Reconstructed polymer films have been prepared by the excimer laser ablation of polymers, followed by the deposition onto another substrate. The composition of reconstructed polymer films was highly dependent on the wavelength and/or fluence of the laser light. Laser-induced polymerization has been performed by excimer laser ablation of solid monomers like 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) onto another substrate. Semi-conductive polymer films were prepared. Polymerization by laser-assisted deposition is a CVD-like technique for the preparation of polymers, applied to gaseous monomers, like polythiophene from thiophene.