L'ODER – The Great Charity Brocante of Montmorency

ODER: sixty years of solidarity through brocante

Since 1964, the Opération d'Entraide Régionale (ODER) has brought together hundreds of volunteers from the Montmorency valley every Ascension weekend around a common goal: organising Île-de-France's largest charity flea market to benefit local associations helping elderly, disabled and struggling people. In 2026, ODER celebrates its 62nd edition, testament to remarkable associative vitality.

An extraordinary logistics operation

Organising ODER is a true logistical challenge met with aplomb every year. More than 500 volunteers from over 80 communes participate: collecting donations, sorting items, setting up stalls, selling and redistributing proceeds. Object donations take place from 3 to 9 May 2026 (2–6 PM) at 12 bis, avenue Victor Hugo in Montmorency, ahead of the main sales days.

5,000 m² of finds to explore

Over more than 5,000 square metres, visitors discover around twenty themed stands organised by category: books, crockery, clothing, toys, tools, furniture, art objects, appliances, and much more. More than 10,000 visitors come to the site each year over the three days of sales.

Supporting local charities

All proceeds from ODER are redistributed as grants to local associations in the Montmorency valley, which help elderly people, people with disabilities, and families in difficulty. ODER is thus far more than a brocante: it has been a pillar of local solidarity for more than half a century.