Title: Khovanov homology of knots. Abstract. This is an introduction to the Khovanov homology of knots which catgorify the famous Jones polynomial. I introduce the Jones polynomial via the Kauffman bracket and then show how this definition can be converted into a construction of the Khovanov chain complex. The chain complex does depend on the knot diagram but its homology does not. I will give a simplest example of the calculation of the Khovanov homology and explain the idea of the proof of its invariance under the Reidemeister moves. A standard course of linear algebra should be sufficient for understanding most of the lecture. Although a familiarity with tensor product of vector spaces and abstract algebra would make it easier.