The charge was processed through the Scottish Football Association's new fast-track system.
A Rangers statement said: "Rangers Football Club today received a Notification of Complaint from the SFA in connection with an incident involving Steven Naismith and Austin McCann at Saturday's SPL match against Dunfermline.
"After reviewing video footage, the club has decided to accept the Fixed Suspension and as such the player will miss the next two SPL matches - against Kilmarnock tomorrow evening and Hibernian at the weekend.
"Steven has already had an apology accepted by Austin McCann and admits there was no deliberate intent to make contact with the player at East End Park.
"As manager Ally McCoist stated at today's pre-Kilmarnock press conference, Rangers supports the new SFA fast-track process for dealing with disciplinary matters and trusts it will be applied fairly across all clubs."