The present invention addresses the problem of providing an inkjet head, a head module, and an inkjet recording device, which are capable of controlling the temperature of ink in a highly accurate manner. This inkjet head 10 is provided with: a head chip 20; a common ink chamber 40; an outer cover frame 50 having a heat dissipation section 51; a drive section 61 mounted to a housing 60 and driving a piezoelectric element 5; a temperature detection section 80 for detecting the temperature of the head chip 20; and a first heater 52 driven on the basis of the temperature detected by the temperature detection section 80 and heating the outer cover frame 50. The inkjet head 10 is characterized in that, when the thermal resistance from the head chip 20 to the heat dissipation section 51 is Ra (°C/W), the thermal resistance from the drive section 61 to the heat dissipation section 51 is Rb (°C/W), and the thermal resistance from the first heater 52 to the heat dissipation section 51 is Rc (°C/W), the relationship of Rc