He will eligable for parole in three years and eight months.
The man who was once Australia's most powerful Catholic sat in the dock dressed in a suit without a clerical collar, as County Court Chief Judge Peter Kidd carried out the sentencing.
"I am mindful I am sentencing you within a unique context," the chief judge said.
"As I directed the jury who convicted you in this trial, you are not to be made a scapegoat for any failings or perceived failings of the Catholic Church.
"Nor are you being sentenced for any failure to prevent or report child sexual abuse by other clergy within the Catholic Church.
"You have not been charged with or convicted of any such failings."
But he did describe Pell's offending as sustained, with multiple sexual acts carried out amid "callous indifference" to the boys.
Pell, 77, has spent the past two weeks in custody waiting to be sentenced for one count of sexual penetration of a child under 16 and four counts of committing an indecent act with a child.
Each charge carried a maximum penalty of 10 years in jail.
A large crowd, including abuse victims, advocates and media, waited outside the courtroom for the doors to open this morning.
Pell is the most senior Catholic worldwide to be convicted for child sex offences and his sentencing was broadcasted live on television, reflecting the high level of interest in the case.
The offences against two 13-year-old boys took place after Sunday mass in late 1996 and early 1997 in a room and a corridor at St Patrick's Cathedral, in Melbourne, where Pell was archbishop.
The top Catholic was convicted in December, but the verdict was suppressed from being made public by a court order until 26 February, when further child sex offence charges against Pell dating back to the 1970s were dropped.
Pell maintained his innocence throughout and has filed an appeal, which is set to be heard in June. He has been held in a maximum security prison since 27 February, when his bail was revoked.