Product configuration is a key enabling technology for implementing mass customization production. In this paper, we present an approach for modeling product configuration problems using Petri Net, a well-defined formalism for describing complex discrete systems. In the presented approach, components within a configurable product are modeled as places of PN whereas structural relationships between components are represented as transitions of PN. Configuration rules such as inclusion and exclusion rules are also described through the elements of PN. By modeling product configuration as a PN, a configuration solution is a set of transitions leading from the initial state of PN to a final state of PN. Therefore, the configuration problem can be solved by analyzing corresponding PN representation.