Official figures show there were more than 40 sex offenders who were charged with a further sexual or violent offences in 2008/09.
Labour and the Tories said the total compared with just nine the previous year.
The number of registered sex offenders in Scotland who committed another sexual or violent crime has increased fivefold, it was claimed.
Official figures show there were more than 40 sex offenders who were charged with a further sexual or violent offences in 2008/09.
Labour and the Tories said the total compared with just nine the previous year.