Ex-Labour MP Jim Devine has been found guilty of dishonestly claiming £8,385 of expenses by using false invoices for cleaning and printing work.
The ex-MP for Livingston, 57, was found guilty on two counts, but cleared of a third count, relating to £360.
Devine nodded as the verdicts were delivered. Sentencing is in four weeks. The maximum jail term is seven years.
He was the first MP to stand trial in the wake of the revelations about Parliamentary expenses claims.
The jury took two hours and 45 minutes to agree their verdicts on the three counts.
Peter Wright QC, prosecuting, said the case against Devine was “very straightforward”, saying Devine made the fraudulent claims “with a view to gain for himself, or with an intent to cause loss to another – the public purse”.
He said the Green Book guide for MPs made clear that when claiming expenses MPs should be guided by the principles of “selflessness, integrity, objectivity, accountability, openness, honesty and leadership”.