Medical solution injection tool for living body

The invention provides a medical solution injection tool for living bodies, which can make a medical solution finer and spray the medical solution into a body cavity. This nozzle for a biological liquid medicine injection tool is provided with: a tubular liquid medicine discharge unit (discharge tube (13)) which is provided at the tip (head (12)) of the nozzle and discharges a liquid medicine located in an internal space; and a gas ejection unit (12f) that is located in the vicinity of the ejection tube (13) and sprays the chemical solution in a mist form by ejecting gas to the chemical solution ejected from the ejection tube (13). In the discharge tube (13), an inflow opening (slit (13b)) is formed on the gas discharge section (12f) side, and an outflow opening (slit (13c)) is formed on the opposite side from the gas discharge section (12f) side. The gas ejection unit (12f) ejects the supply gas in a direction intersecting the ejection direction of the chemical solution ejected from the ejection tube (13). T