At the October 27-28 event, would-be divorcees can consult, anonymously if they wish, a whole host of lawyers and mediators on their rights and obligations, and seek advice on frequently difficult questions, such as alimony and child access.
They can also consult experts on how best to organise their new post-married lives.
Nearly 50 percent of all marriages in Austria end in divorce -- the figure is 66 percent in Vienna -- and the two-day fair is being held under the motto: "Start your life afresh". Organisers are hoping it will bloom into a twice-yearly event.
Up to 20 exhibitors have so far registered, not only lawyers and mediators, but also estate agents, life-crisis experts and -- reflecting the messier side of divorce -- private detective firms and DNA laboratories offering paternity tests.
The archdiocese of the city of Vienna will also have a stand, as will a company offering package holidays for freshly divorced people.
There will also be a series of lectures ranging from a children's view of divorce to single-parenting.