This bachelor thesis studies the impact of extensive reading on primary school learners of English. The work explains that extensive reading influences positively both language skills and students' motivation. The bachelor thesis is focused on the importance of connecting extensive reading with reading for pleasure, fluent reading and reading for general understanding. In the theoretical part, the term extensive reading is explained in detail. Above all I focused on the value of extensive reading and its impact on various language areas. I tried to find the most suitable and efficient methods to include extensive reading in the language classroom to encourage learners to read extensively. In the practical part of this thesis, I dealt with creating and including an extensive reading programme in the school where I teach. The aim of my reaserch was to analyze data obtained from the tests where students' reading rates, reading comprehension, language proficiency and vocabulary knowledge were measured before and after the extensive reading programme and thus to prove that extensive reading has a positive and powerful effect on learning language.