A fitting connector comprising: a first connector that includes a terminal and a housing holding the terminal; a second connector that includes a counterpart terminal and a counterpart housing holding the counterpart terminal, and is configured to electrically connect the terminal with the counterpart terminal when a fitting state between the housing and the counter housing along with insertion and fitting between the housing and the counter housing is in a complete fitting state; and a holding structure that includes a first latch hold portion provided on the housing and a second latch hold portion provided on the counterpart housing, is configured to cause the first latch hold portion and the second latch hold portion to be in a state capable of latching in a connector removal direction when the fitting state is in the complete fitting state, and maintains the fitting state in the complete fitting state as is, wherein the holding structure includes a latch hold body on which the first latch hold portion is provided, and the latch hold body includes the first latch hold portion provided on one end in a connector insertion-removal direction, a latch-release operation portion provided on the other end in the connector insertion-removal direction, a cantilever latch arm portion on which the first latch hold portion is provided at a free end and arranged between the first latch hold portion and the latch-release operation portion, a latch-release arm portion coupling the first latch hold portion and the latch-release operation portion, a first fulcrum portion as a point of action with a contact point with a first release-operation force receiving portion as a fulcrum when the latch-release operation portion as a point of effort is pushed, the first fulcrum portion is configured to exert force in a detaching direction on the first latch hold portion in a state where the first latch hold portion and the second latch hold portion are able to latch, and a second fulcrum portion provided on the latch-release operation portion side relative to the first fulcrum portion in the latch-release arm portion and configured to contact with a second release-operation force receiving portion on the latch-release operation portion side relative to the first release-operation force receiving portion along with continuation of the push operation and exert the force in the detaching direction on the first latch hold portion as a point of action with a contact point with the second release-operation force receiving portion as a new fulcrum characterised in that, the first fulcrum portion is provided on the latch release arm portion. a first connector that includes a terminal and a housing holding the terminal; a second connector that includes a counterpart terminal and a counterpart housing holding the counterpart terminal, and is configured to electrically connect the terminal with the counterpart terminal when a fitting state between the housing and the counter housing along with insertion and fitting between the housing and the counter housing is in a complete fitting state; and a holding structure that includes a first latch hold portion provided on the housing and a second latch hold portion provided on the counterpart housing, is configured to cause the first latch hold portion and the second latch hold portion to be in a state capable of latching in a connector removal direction when the fitting state is in the complete fitting state, and maintains the fitting state in the complete fitting state as is, wherein the holding structure includes a latch hold body on which the first latch hold portion is provided, and the latch hold body includes the first latch hold portion provided on one end in a connector insertion-removal direction, a latch-release operation portion provided on the other end in the connector insertion-removal direction, a cantilever latch arm portion on which the first latch hold portion is provided at a free end and arranged between the first latch hold portion and the latch-release operation portion, a latch-release arm portion coupling the first latch hold portion and the latch-release operation portion, a first fulcrum portion as a point of action with a contact point with a first release-operation force receiving portion as a fulcrum when the latch-release operation portion as a point of effort is pushed, the first fulcrum portion is configured to exert force in a detaching direction on the first latch hold portion in a state where the first latch hold portion and the second latch hold portion are able to latch, and a second fulcrum portion provided on the latch-release operation portion side relative to the first fulcrum portion in the latch-release arm portion and configured to contact with a second release-operation force receiving portion on the latch-release operation portion side relative to the first release-operation force receiving portion along with continuation of the push operation and exert the force in the detaching direction on the first latch hold portion as a point of action with a contact point with the second release-operation force receiving portion as a new fulcrum characterised in that, the first fulcrum portion is provided on the latch release arm portion.