It happened just after midnight on Thursday, on the 900 block of South Street in South Philadelphia.
The thief made off with a Black Trek bike with white police lettering on the side and red decals.
A bike helmut and handcuffs were also attached to the bicycle.
There's no word on where the police officer was when the thief grabbed the bike.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.
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