Norman Brennan, director of the Victims of Crime Trust, said Five should start doing its bit to make Britain a safer place.
He said: 'There is too much violence on television - and it's no coincidence that teachers are telling us schools are more violent than ever, and that violence on the streets is at record levels.'
Of the 205 films chosen for analysis by Mediawatch volunteers, 47 were on BBC1, seven on BBC2, 25 on ITV1, 34 on Channel 4 and 92 on Five.
They contained 1,121 incidents involving firearms, 765 violent assaults, 103 explosions or arson attacks and 277 incidents involving knives or other weapons.
The number of films shown on terrestrial TV has dropped over the past five years from 3,259 in 1999 to 2,880 in 2003. Five shows around a third of the total.
Earlier this year scientist Lord Robert Winston revealed that experiments had shown violence on screen could directly cause toddlers to be more violent.
A Five spokesman said last night that its output complied with regulations laid down by broadcasting watchdog Ofcom and it had received only six complaints from viewers this year about violence.