Liquid droplet ejection head, image forming apparatus, and manufacturing method of liquid droplet ejection head

A liquid droplet ejection head comprising:

• plural nozzles configured to eject liquid droplets;
• plural individual liquid chambers in communication with the plural nozzles;
• a common liquid chamber configured to supply liquid to the plural individual liquid chambers;
• a filter sheet member disposed in a liquid flow path to supply liquid from the common liquid chamber to the plural individual liquid chambers and including plural pores formed therein to filter the liquid;
• and
• a frame body including an opening part and being in connection with the filter sheet member with adhesive applied therebetween,
• wherein a size of a region where the plural pores are formed in the filter sheet member is greater than a size of the opening part of the frame body,
• wherein an adhesive accumulation area where the adhesive protruded due to the connection is accumulated is formed on an inner peripheral end of the opening part of the frame body, and
• wherein a size of the adhesive accumulation area in a protruding direction of the adhesive is greater than a size of an area between adjacent pores in the filter sheet member.