This drug delivery device (1) safely delivers a drug between a syringe barrel (6), a drug container (2) and an infusion device (62), and prevents leaking and dripping of hazardous drugs from said parts by providing a mechanism which does not allow dissolution of the connection relation between the parts that have been coupled to deliver the drug. This drug delivery device (1) delivers the drug between the syringe barrel (6), the drug container (2) and the infusion device (62), and is provided with a first member (8) connected to the drug container (2) on the side of a stopper (4), and a second member (44) connected at one end to the first member (8) and connected at the other end to the syringe barrel (6). The first member (8) is provided with a first hollow needle member (12), a third hollow needle member (32), a first slip prevention member (38) which prevents dissolution of the connection relation between the drug container (2) and the first member (8), and a second slip prevention member (40) which prevents dissolution of the connection relation between the drug container (2) and the infusion device (62). The second member (44) has a second hollow needle member (48). The drug is delivered between the drug container (2) and the syringe barrel (6) through the first hollow needle member (12) and the second hollow needle member (48) inserted into the first hollow needle member (12), and is delivered between the drug container (2) and the infusion device (62) through the third hollow needle member (32).Linvention concerne un dispositif dadministration de médicament (1) qui administre en toute sécurité un médicament entre un corps de seringue (6), un récipient de médicament (2) et un dispositif de perfusion (62), et empêche la fuite et légouttement de médicaments dangereux à partir desdites parties en fournissant un mécanisme qui ne permet pas la dissolution de la relation de liaison entre les parties qui ont été couplées pour administrer le médicament. Le dispositif
