In a lever-type connector, a lever 70 is pivotally mounted on a second connector housing 60, and by operating an operating portion 71 of the lever toward a fitting side, the second connector housing is fitted to a first connector housing 10. By operating the operating portion to a cancellation side opposite to the fitting side, the fitted condition is canceled. A detection member 50 is slidably mounted on the first connector housing. When the lever is pivotally moved to a completely-fitting operating position where the two connector housings are properly fitted together, the detection member can be slid, and the thus slid detection member tells a completely-operated condition of the lever, and also prevents the operating portion of the lever from being operated to be moved toward the cancellation side. When the lever is stopped in a half-fitting operating position before the completely-fitting operating position, the detection member interferes with the operating portion of the lever, and is prevented from sliding movement, and tells an incompletely-operated condition of the lever.