This paper discusses the Crusades which passed through the Croatian lands from 1096 to 1270. Europe at the end of the early Middle Ages is in the secular and spiritual chaos. As a result of the reform of the Church and other circumstances in the second half of the 11th century, there is an idea and an institution of Crusade. The idea of the Crusades is complex and it had different interpretations thoughout centuries. The primary aim was the liberation of the Christ's tomb from the hands of infidels, but after the 1270 the aims of Crusades differ more and more from the original task. After using and reading different books can be concluded that crusaders of first, second, third, fourth and fifth Crusade passed through the Croatian lands and the sources for these crusades are quantitatively different. We do not have data about echoes of other three crusades, but in the first half of the 13th century in Europe and in our region various heretical movements began to be intensively pursued under the auspices of the crusade. It is difficult to establish precisely how has all this affected the Croatian lands which during three centuries changed several dynasties because of the lack of original material. During the Crusades the medieval Croatia in itself is not part of those countries which are the carriers of the Crusades to the East. However it is certain that the Croats eventually met with the crusade idea and crusades, and that, given the circumstances and the time, it acted in accordance with them.