Narcotic scent traning aids (or pseudoscent, scent simulation, scent surrogate, scent reference) are fabricated mixtures which are comprised of non-narcotic materials but odoriferously identical or have specific scent signatures of a narcotic. Due to prominent advantages comparing to real narcotics in canine training, narcotic training aids are now more and more widely used in many countries. In present study, two commercially marijuana training aids were collected and analyzed for the purpose of producing a similar canine training aid. Both collected samples and our fabricated product were tested with certified marijuana police dogs (dogs trained with real marijuana) and used to train new canines, which were then tested for their ability to detect real marijuana samples. With high rate of alerts to different real marijuana samples in field trials, the study showed that our marijuana scent formulation could be used to substitute real marijuana in canine training and help to overcome current difficulties due to strict legal framework in supply, usage and management of real narcotics