Useful link : googlemap  

Metro : Lines 4 and 10 station "Odéon" or Line 10 station "Cluny-la-Sorbonne"

RER : station "Luxembourg" (Ligne RER B) or station "St Michel-Notre Dame" (Lines RER B and C)

Bus : 21, 27, 38, 58, 63, 70, 82, 84, 85, 86, 87, 89, 96.

Nearby car parks :
about 25 euros for 24 hours : Rue de l'Ecole de Médecine or Rue Soufflot
You can book your parking place in advance online on:www.parkingsdeparis.com

Montparnasse Station - direct bus 58 or 96 or métro line 4

Austerlitz Station -direct bus 63, métro line 10 or RER C

Gare de l'Est - direct bus 38 or métro ligne 4

Gare du Nord - direct bus 38, métro ligne 4 or RER B

Gare de Lyon - direct bus 63 or 87

Gare Saint Lazare - direct bus 21 or 27

From Roissy-Charles de Gaulle airport :
Direct via the RER line B. Station "LUXEMBOURG". Exit : "Jardin du Luxembourg"

From Orly airport :
Take the ORLYVAL to Antony then take the RER B. Station "LUXEMBOURG". Exit : "Jardin du Luxembourg"