To provide a seating appliance having callapsible support surface, capable of allowing an easy collapsible or expanding work, giving a small overall size in a collapsed state for small storage space, keeping a table or seat surface stable, and ensuring a good feeling for the use of a table or a feeling of comfort on a seat in an expanded state.

The seating appliance with collapsible support surface is equipped with a desk member 20 having at least one support face member with a top 21 and a bottom, first support legs 30 and 30 as a pair journalled to the bottom of the support member at a first position, and second support legs as a pair journalled to the bottom of the support face member at a second position, with the intermediate part journalled to an intermediate part between the first support legs 30 and 30. Also, the appliance is formed out of one of the support legs 30 and 30, and a seat unit 13 rotatably journalled to the bottom of the desk member 20.