The index, which fell 0.3 percent in September, reached 104.9 in October.
The index is a comparison to average monthly index in 2004, which was assigned an index value of 100.
With a two-month contraction, "the outlook for the Euro Area economy remains weak," said Conference Board economist Bert Colijn.
"However, the six-month growth rate of the leading economic index has become less negative, pointing to a small chance of a deep contraction," Colijn said.
The Coincident Economic Index for the eurozone, a measurement of current economic conditions, was unchanged at 102.2 in November, the Conference Board said.