Interval timing (i.e.the perception of time in the seconds-to-minutes range) allows various animal species including humans to estimate duration of elapsed time. This process can be disrupted by cannabinoids and most often it is subjectively perceived as time deceleration. This work will describe the main models of interval timing, neuroanatomical structures involved in this process, and the main neurotransmitters. The results of studies examining the effect of cannabinoid on the interval timing, possible explanations according to the particular models, and the interaction between the cannabinoid and dopaminergic systems will be described as well. Keywords: interval timing, time perception, cannabinoids, dopamine