Iain Sutcliffe will head to Northamptonshire on loan for a month from August 8, to strengthen the top order.
Northants' overseas player Chris Rogers will leave the county to attend an Australia players training camp, with his last match in the Championship against Middlesex, which starts on August 14.
David Capel, Northants' head coach, said: “We feel Iain has the special qualities and skills, combined with a wealth of experience, that we are looking for."
Mike Watkinson, Lancashire's cricket manager, said “Despite recently being out of our side Iain is still very much in our plans for the remainder of the season. This period of first team cricket will be ideal preparation for this.”