An intradermal injection adapter (10"), in particular for use in an intradermal injection assembly for injecting a medicament from a pre-filled automatic injection device (12") into a dermal skin layer, the automatic injection device (12") including a medicament storage volume (44") sealed by a penetrable seal (64"), the adapter (10") comprising: a body (16") having a longitudinal axis (18"); a central portion (24") located distally relative to the body (16") along the longitudinal axis (18"), the central portion (24 ") having a cannula channel (26 ") therethrough extending generally parallel to the longitudinal axis (18") and having a cannula channel edge (26a"); a distal protrusion (30") having a first skin contacting surface (34") extending generally parallel to the longitudinal axis; a second skin contacting surface (28 ") extending proximally from the cannula channel edge (26a"); the distal protrusion (30") comprising a curved distal nose (32"), the distal nose (32") curving away froth the longitudinal axis (18 "), characterized by the adapter (10") being attachable to a distal end of the pre-filled automatic injection device (12"); the adapter (10") having a cannula (14") for making an intradermal injection, the cannula (14") being-fixed within the cannula channel (26") and having a sharpened tip (14a") for injection into a patient and a sharpened opposite proximal end (14b") for puncturing the penetrable seal (64") for flow communication with the medicament storage volume (44") the first skin contacting surface (34") being spaced from the cannula (14") such that a distal portion of the cannula (14") extends generally parallel to the first skin contacting surface (34"), the first skin contacting surface (34") extending distally beyond the sharpened tip (14a") of the cannula (14") and the distal protrusion (30") comprising a generally clear or transparent material, at least distally toward the distal nose: relative to a demarcation plane and is generally cloudy or opaque proximally to the demarcation plane, the demarcation plane being defined where the cannula (14") crosses the cannula channel edge in the assembled configuration. a body (16") having a longitudinal axis (18"); a central portion (24") located distally relative to the body (16") along the longitudinal axis (18"), the central portion (24 ") having a cannula channel (26 ") therethrough extending generally parallel to the longitudinal axis (18") and having a cannula channel edge (26a"); a distal protrusion (30") having a first skin contacting surface (34") extending generally parallel to the longitudinal axis; a second skin contacting surface (28 ") extending proximally from the cannula channel edge (26a"); the distal protrusion (30") comprising a curved distal nose (32"), the distal nose (32") curving away froth the longitudinal axis (18 "), characterized by the adapter (10") being attachable to a distal end of the pre-filled automatic injection device (12"); the adapter (10") having a cannula (14") for making an intradermal injection, the cannula (14") being-fixed within the cannula channel (26") and having a sharpened tip (14a") for injection into a patient and a sharpened opposite proximal end (14b") for puncturing the penetrable seal (64") for flow communication with the medicament storage volume (44") the first skin contacting surface (34") being spaced from the cannula (14") such that a distal portion of the cannula (14") extends generally parallel to the first skin contacting surface (34"), the first skin contacting surface (34") extending distally beyond the sharpened tip (14a") of the cannula (14") and the distal protrusion (30") comprising a generally clear or transparent material, at least distally toward the distal nose: relative to a demarcation plane and is generally cloudy or opaque proximally to the demarcation plane, the demarcation plane being defined where the cannula (14") crosses the cannula channel edge in the assembled configuration.