Laws of nature play a prominent role in modern science as well as in many areas in philosophy. Laws have a close conceptual relation to explanation, confirmation, causation, counterfactuals, and probabilities. They are also involved in metaphysical issues concerning reduction and freedom of will. Nonetheless, the nature, or even the existence, of natural laws is a contentious issue. This course provides a general introduction to the major philosophical problems concerning laws of nature. The course is structured around three main topics. First, we shall discuss the classical rationalist and empiricist accounts of laws; then we shall investigate some specific kinds of laws (physical, statistical, ceteris paribus, etc.); and finally, we shall address the question about metaphysical foundations of laws.