Jaroslav Neverovic said that Lithuania was being forced to pay a “political price” for being entirely dependent on Russian gas supplies.
The crisis in Ukraine has led to calls for the US to ease its current restrictions on gas exports.
Some analysts have suggested that doing so would help challenge Russia’s dominance in the sector.
In his statement to a US Senate committee, Mr Neverovic urged members to do everything within their power to release natural gas resources “into the world market”.
“A law enacted in your country some 75 years ago denies us access to your abundant and affordably priced energy resources,” he said.