the partitioning wall 108 to summarize in this embodiment both of the vertical surfaces surface perpendicular to recording chip supporting surface of each partitioning wall are provided with multiple protrusions 108 b which are arranged in the lengthwise direction of the partitioning wall 108 with equal intervals are multiple recesses 108 a which also are arranged in the lengthwise direction of the partitioning wall 108 with equal intervals so that the multiple protrusions 108 b and multiple recesses 108 b are alternately positioned in terms of the lengthwise direction of the partitioning wall 108 therefore even the bodies of the applied adhesive 104 on the portions of each of the partitioning walls 108 remain stable in shape further even in the case where the adhesive 107 is exuded onto the partitioning wall 108 with the needle slightly displaced relative to the partitioning wall 108 the body of the adhesive 104 applied to the partitioning wall 108 satisfactorily remains on the partitioning wall 108 further in this embodiment both of the vertical surfaces surface perpendicular to recording chip supporting surface of each partitioning wall are provided with multiple protrusions 108 b and multiple recesses 108 a which are arranged in the lengthwise direction of the partitioning wall 108 with equal intervals however as long as one.