Mouthpiece for fluid dispenser device The mouthpiece for the fluid dispenser device (10) being, the fluid dispenser open part where the fluid is discharged (20) the substance which has (11) it possesses, becoming feature the description above itself (11), displays the form whose convex shape is long substantially, the surface (12), the aforementioned dosage open part (20) in the form which is installed the aforementioned dosage open part (20) we have extended to longitudinal direction on both sides, the aforementioned dosage open part (10) on both sides, two side receiving aspects in order to support the lip of the user which is in the midst of sucking (13) it is provided, the aforementioned mouthpiece that the aforementioned surface (12), barely in a convex way, the aforementioned side receiving aspect (13), it is barely in a concave way.< Selective figure >Figure 1流体ディスペンサ装置用のマウスピース流体ディスペンサ装置用のマウスピース(10)であって、流体が放出される流体ディスペンサ開口部(20)が備えられた本体(11)を有し、特徴となるのは、前記本体(11)は、実質的に凸形の細長い形状を呈し、その上面(12)は、前記投与開口部(20)が組み込まれた形で前記投与開口部(20)の両側に長手方向に延びており、前記投与開口部(10)の両側面には、吸入中のユーザの唇を支持するための2つの側面受け面(13)が設けられており、前記上面(12)は、わずかに凸形で、前記側面受け面(13)は、わずかに凹形であることである、という前記マウスピース。【選択図】図1