The purpose of this book is to provide Microeconomics students with the necessary tools to understand the behavior of supply and demand, consumers and producers, as well as the definitions, characteristics, operation and equilibrium of the different types of market structures for goods and services, using the teaching experience to emphasize those points in which students tend to fail due to the similarities of some models. The theory presented is accompanied by annotated figures that point out the different equilibrium situations of the consumer, the producer and the market of perfect and imperfect competition, with the intention that the quantity that maximizes consumer satisfaction, as well as the quantity to be produced and the price of the product that maximizes the profits of the entrepreneur or minimizes his losses, can be visualized quickly and precisely.