This paper investigates the way English collocations are rendered by students of simultaneous interpretation. Collocations are an integral part of every language and that is why they are given special importance in interpretation. In the first part of the paper, different views on collocations in British linguistics and types of collocations will be presented. There will also be talk about similarities and differences between collocations, free phrases and idioms. When speaking about collocations from the point of view of Croatian linguistics, we will see that there is a plenty of work ahead of Croatian linguists who need to agree on basic principles regarding the concept of collocations. It has also been recognized in foreign language teaching that non-native speakers should acquire words as constructions, i.e. collocations, not as single words. For a translator, i.e. interpreter it is also important to be aware that collocations may not be translated, i.e. interpreted as easily as one may think and translation equivalence is concerned with this issue. Next, some general notions regarding simultaneous interpreting will be presented: its historical development, various types and influence of technology reflected on oral translation in general. Furthermore, interpreter’s profile and professional environment will also be discussed. Every translator, i.e. interpreter should be aware that his/her own language knowledge and use is influenced by his/her own language perception. Methodology will describe how the speeches were analyzed and the section Analysis and findings will present the results of the study.