A flip cover structure for a chassis which includes a casing, a cover covered onto the casing, a stopping member installed to the casing and at a pivoting position of the cover, a fixing component disposed on the cover and corresponsive to the stopping member, a control member movably installed to the fixing component, an acting member integrally formed with the control member and situated in a stressed state. When the cover is pivoted upward, the fixing component will be flipped together with the cover, and the acting member changes its stressed state to a released state, such that the control member is displaced by the resilience of the acting member to a position opposite to the stopping member to stop the cover at the stopping member and erect the cover at a specific angle on the casing. Therefore, maintenance persons no longer need to find extra space for accommodating the cover.