A needle-equipped syringe reduces an inclination of a needle by reducing an inclination of a core pin when insert molding is performed. The needle-equipped syringe includes a barrel formed using a resin and having a cylindrical body, a nozzle part provided at a distal end of the body, and an opening part provided at a proximal end of the body； and an injection needle held by the nozzle part. The injection needle and the barrel are integrally molded so that an axis of the injection needle is substantially parallel to an axis of the body. The body has a thick part and a thin part located at a proximal end of the body at opposing positions across the axis of the body. At the proximal end of the body, an axis of an inner surface of the body is offset from an axis of an outer surface of the body.
