Abstract: A device for collecting seminal fluid, comprises a collecting container (1) on which is mounted an adaptor (2) provided with a cannula (3) for sucking up the seminal fluid under the effect of a partial vacuum. The device further includes an adaptor sleeve (5) interposed between the container (1) and the adaptor (2). The sleeve comprises a chamber (10) in communication with the adaptor (2) in which chamber a filter (11) for the seminal fluid is located. A pipe (16) for sucking up the fluid and having a first flared end portion (17) emerges on the filter (11) and a second end portion (18) emerges in the container via a projection (19) extending axially beyond the end (20) of the sleeve pointing towards the container. A sucking-up duct (21) intended to be connected to a source of partial vacuum terminates at the end (2) of the sleeve inside the container in order to generate, within the container (1), a partial vacuum intended to bring about the sucking-up of the seminal fluid through the filter (11).