A portable cutlery, comprising a first casing and a second casing, an accommodation room being defined between the first casing and the second casing after the first casing and the second casing are connected face-to-face, a cutlery being accommodated in the accommodation room, whereby one side of the first casing, facing the second casing, has a first engaging groove, and the second casing is provided with a buckle that is movable between a locking position and an unlocking position, one side of the buckle, facing the first casing, has a second engaging groove, and the cutlery has a functional end portion for taking food, a connecting end portion and a pivot portion between the functional end portion and the connecting end portion, characterized in that said one side of the first casing, facing the second casing, has a first engaging block, one side of the second casing, facing the first casing, has a pivot, said one side of the buckle, facing the first casing, has a second engaging block, when the first casing and the second casing are connected face-to-face and the buckle is moved to the unlocking position, the first engaging block is disengaged from the second engaging groove, the second engaging block is disengaged from the first engaging groove, and the first engaging block leaves the second engaging block, thereby unlocking the first casing and the second casing; when the buckle is moved to the locking position, the first engaging block is engaged in the second engaging groove, the second engaging block is engaged in the first engaging groove, and the first engaging block and the second engaging block block each other, thereby locking the first casing and the second casing; said pivot portion of the cutlery is pivotally connected to the pivot, so that the functional end portion or the connecting end portion is selected to be moved out of the accommodation room by pivoting the cutlery. the second casing is provided with a buckle that is movable between a locking position and an unlocking position, one side of the buckle, facing the first casing, has a second engaging groove, and the cutlery has a functional end portion for taking food, a connecting end portion and a pivot portion between the functional end portion and the connecting end portion, characterized in that said one side of the first casing, facing the second casing, has a first engaging block, one side of the second casing, facing the first casing, has a pivot, said one side of the buckle, facing the first casing, has a second engaging block, when the first casing and the second casing are connected face-to-face and the buckle is moved to the unlocking position, the first engaging block is disengaged from the second engaging groove, the second engaging block is disengaged from the first engaging groove, and the first engaging block leaves the second engaging block, thereby unlocking the first casing and the second casing; when the buckle is moved to the locking position, the first engaging block is engaged in the second engaging groove, the second engaging block is engaged in the first engaging groove, and the first engaging block and the second engaging block block each other, thereby locking the first casing and the second casing; said pivot portion of the cutlery is pivotally connected to the pivot, so that the functional end portion or the connecting end portion is selected to be moved out of the accommodation room by pivoting the cutlery.