Flow cell and measuring device

A flow cell comprising:

• a flow path in which a specimen fluid and a sheath fluid flow;
• a specimen flow path that introduces the specimen fluid into the flow path;
• a first sheath flow path and a second sheath flow path that introduce the sheath fluid into the flow path;
• and
• a merging portion at which the specimen flow path, the first sheath flow path and the second sheath flow path merge together,
• wherein:
• the specimen flow path is provided on a central flow line of the flow path,
• the first sheath flow path has a first introducing opening that leads to the merging portion,
• the second sheath flow path has a second introducing opening that leads to the merging portion,
• the specimen flow path has a specimen introducing opening that leads to the merging portion,
• at the merging portion, the first introducing opening and the second introducing opening face directions intersecting the central flow line of the flow path and are disposed at positions that are offset in a height direction of the flow path, and
• the specimen introducing opening is disposed, at the merging portion, such that, when viewed as a cross-section in a direction along the central flow line of the flow path, there is a first gap between a side wall that faces the first introducing opening and a first side wall of the specimen introducing opening furthest from the first introducing opening, the side wall that faces the first introducing opening and a wall that forms the first gap form a 90° angle, and a second gap between a side wall that faces the second introducing opening and a second side wall of the specimen introducing opening furthest from the second introducing opening.