An armrest comprises a top surface; a first side surface and a second side surface being opposite to said first side surface; wherein said top surface incorporates a number of discrete regions; a first discrete region on which, in use, the elbow of a first user rests; said first discrete region extending diagonally towards said first side surface; and at least one further discrete region located in front of said first discrete region which extends diagonally towards said second side surface; whereby said second discrete region provides, in use, a resting surface for the elbow of a second user seating in an adjacent seat; wherein said first and said second regions are separated in the longitudinal direction by a line of separation which doesn't protrude higher than the majority of the top surface.