The subject of thesis is analysis of influence of hybrid (prototype) mould on thin-wall thermoplastic moulded part produced by injection moulding. Rapid Tooling procedures enable manufacturing of mould inserts in very short time; but due to differences in material properties of these inserts as well as in the way of their manufacturing there are certain deviations in moulded parts properties in comparison with moulded parts produced in classical mould. Therefore thesis emphasizes compared analysis of influence of both moulds on moulded part properties and dependent processing parameters. Computer simulation of classical injection moulding process has already been proved as very useful tool for prediction of processing parameters and some moulded part properties. Field of application of simulation in case of thinwall injection moulding has not been enough investigated yet; so the analysis of its application in this field was performed in the thesis. Computer simulation was used for prediction of occurrences in both moulds as well as for definition of initial processing parameters. Experimental analysis was used for determination of influence of single injection moulding parameter on moulded part properties. Analysis has shown that application of hybrid mould results with lower moulded part properties in comparison with properties of moulded parts produced in classical mould (moulded part deformation and impact resistance). In order to make moulded parts properties produced in hybrid mould closer to those produced in classical mould; in case of hybrid mould an optimization of significant independent adjustable processing parameters has been performed. Optimization results with obvious decreasing of initial moulded parts properties differences. Experimental analysis also enabled review of applicability of computer simulation for thin-wall injection moulding in classic and hybrid mould. Generally simulation results with satisfactory data except in prediction of moulded part deformation. Thesis also emphasizes analysis of sensitivity of both mould types on delays during mould operation. Hybrid mould was recognized as slightly more sensitive in comparison with classic mould.