Healey joined the Massachusetts Police Chiefs Association and other law enforcement agencies Thursday to release a statement saying "it would be tragic for this to become the next deadly loophole in our nation's gun laws."
The measure would let gun owners with a state-issued concealed-carry permit carry a handgun in any state that allows concealed weapons.
Healey called the bill "reckless" and urged the Senate to respect state laws. Massachusetts has some of the nation's strictest gun laws.
The House approved the bill Wednesday largely along party lines. No member of Massachusetts' all-Democratic House delegation voted for it.
Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.