Transperth says it has no concerns over the way guards dragged a man and what's claimed is his therapy dog from a train.

In a video posted to social media on Tuesday a man can be seen arguing with two transit officers on a Perth train, telling them "don't do it mate" as they try to take hold of him.

The video then shows the guards each holding one of the man's arms as they take him off the train and place him on a seat at a station where a black dog then climbs into his lap.

Footage of the man being taken off the train,. Credit:9 News Perth

It's understood the man claimed the dog was his therapy animal, and that the guards had queried its presence on the train.