You can buy your ticket online and avoid the long line

The cost of the full fare ticket is 14,00 Euro, the cost of the reduced ticket is 8,00 Euro. Every ticket purchased online has a reservation fee of 4,00 Euro.
The ticket gives you the right to visit the Vatican Museums and the Sistine Chapel for the only day of issue.*

The tickets may be reserved (with a maximum of 10) from 60 days before the date of the visit and they are not refundable

Ticket Office online of the Vatican Museums