An endoscope comprising: a first bending portion including a first bending tube which is bendable in multiple directions (U, D) with respect to a straight state; a second bending portion which is provided on a proximal end side of the first bending portion and includes a second bending tube which is bendable in multiple directions (U, D) with respect to a straight state and also bendable in the same directions (U, D) as at least two directions of the first bending portion; a first bending drive mechanism which is configured to bend the first bending portion in the multiple directions (U, D); and a second bending drive mechanism which is configured to interlock with the first bending drive mechanism, which is configured to bend the second bending portion in multiple directions when external force is applied to the second bending portion while the first bending portion is straight, and is configured to generate compression force on a bending direction side of the first bending portion with respect to a center axis of the second bending tube in the second bending portion when a bending angle of the first bending portion is increased with respect to the straight state, wherein the second bending drive mechanism includes a buffer portion (76a, 76b) which is configured to buffer movement interlocked with the first bending drive mechanism, characterized in that the buffer portion (76a, 76b) includes a slider mechanism, the slider mechanism includes a slider which is engaged with a slider receiving portion such that the slider can be relatively moved with respect to the slider receiving portion, wherein there is a looseness formed between the slider and the slider receiving portion, wherein said looseness is defined as a state wherein the slider is apart from a distal end of the slider receiving portion by a length L, the looseness being maximized when the first bending portion is straight and the looseness being reduced as the bending angle of the first bending portion increases from the straight state. a first bending portion including a first bending tube which is bendable in multiple directions (U, D) with respect to a straight state; a second bending portion which is provided on a proximal end side of the first bending portion and includes a second bending tube which is bendable in multiple directions (U, D) with respect to a straight state and also bendable in the same directions (U, D) as at least two directions of the first bending portion; a first bending drive mechanism which is configured to bend the first bending portion in the multiple directions (U, D); and a second bending drive mechanism which is configured to interlock with the first bending drive mechanism, which is configured to bend the second bending portion in multiple directions when external force is applied to the second bending portion while the first bending portion is straight, and is configured to generate compression force on a bending direction side of the first bending portion with respect to a center axis of the second bending tube in the second bending portion when a bending angle of the first bending portion is increased with respect to the straight state, wherein the second bending drive mechanism includes a buffer portion (76a, 76b) which is configured to buffer movement interlocked with the first bending drive mechanism, characterized in that the buffer portion (76a, 76b) includes a slider mechanism, the slider mechanism includes a slider which is engaged with a slider receiving portion such that the slider can be relatively moved with respect to the slider receiving portion, wherein there is a looseness formed between the slider and the slider receiving portion, wherein said looseness is defined as a state wherein the slider is apart from a distal end of the slider receiving portion by a length L, the looseness being maximized when the first bending portion is straight and the looseness being reduced as the bending angle of the first bending portion increases from the straight state.