A safe injecting room for heroin users should be trialled in Richmond to help curb drug deaths, the departing head of the Police Association has said.

Ron Iddles, who retired from his post as Police Association secretary on Thursday, said coroner Jacqui Hawkins' recommendation of a trial should be supported.

His position puts him at odds with Premier Daniel Andrews, who says his government has no plans for a safe injecting room.

"In relation to heroin, where there have been so many deaths, I support a trial," Mr Iddles said. "It is a trial, so why shouldn't we support it?"