A valve device comprising: a valve body having assembly holes (20c-20e) opening to an assembly surface, the assembly surface including an upper end surface and a lower end surface, flat and parallel with each other, together with a stepped portion, flat and substantially perpendicular to the upper end surface and to the lower end surface, each assembly hole (20c-20e) being disposed at a position across the upper and lower end surfaces (22, 24) with the stepped portion located therebetween; solenoid components comprising a first part that is a part of each solenoid component intended to be inserted into each assembly hole (20c-20e), and an engagement groove provided in an outer circumferential surface of each solenoid component in a direction intersecting an axial center of the solenoid component, each engagement groove being provided to a portion of the first part of each solenoid component that is intended to be outside the assembly hole (20c-20e) when the first part is inserted in the assembly hole (20c-20e) and each engagement groove opening upward; a base part outwardly extending from a lower end of the assembly surface in a direction which is substantially perpendicular to the lower end surface, a predetermined gap being provided between the base part and a large-diameter part of each linear solenoid component; and a fixing member fixed to the valve body, the fixing member including locking portions (52a-52h), each of the locking portions (52a-52h) being configured to be inserted into each engagement groove, side walls of each engagement groove being engaged with each locking portion (52a-52h) so as to set a position in an axial direction of each solenoid component, and each locking portion (52a-52h) being engaged with a groove bottom of each engagement groove so as to set a phase around the axial center of each solenoid component. wherein the stepped portion is cutout from an engagement groove side in a radial direction of each of the assembly holes (20c-20e) such that the engagement groove is exposed outside of the assembly holes (20c-20e) when the solenoid components are assembled to the valve body, the stepped portion is cutout such that an upper surface of the stepped portion is located at a lower position than the groove bottom of the engagement groove when the solenoid components are assembled to the valve body through the fixing member so as not to interfere with the fixing member. a valve body having assembly holes (20c-20e) opening to an assembly surface, the assembly surface including an upper end surface and a lower end surface, flat and parallel with each other, together with a stepped portion, flat and substantially perpendicular to the upper end surface and to the lower end surface, each assembly hole (20c-20e) being disposed at a position across the upper and lower end surfaces (22, 24) with the stepped portion located therebetween; solenoid components comprising a first part that is a part of each solenoid component intended to be inserted into each assembly hole (20c-20e), and an engagement groove provided in an outer circumferential surface of each solenoid component in a direction intersecting an axial center of the solenoid component, each engagement groove being provided to a portion of the first part of each solenoid component that is intended to be outside the assembly hole (20c-20e) when the first part is inserted in the assembly hole (20c-20e) and each engagement groove opening upward; a base part outwardly extending from a lower end of the assembly surface in a direction which is substantially perpendicular to the lower end surface, a predetermined gap being provided between the base part and a large-diameter part of each linear solenoid component; and a fixing member fixed to the valve body, the fixing member including locking portions (52a-52h), each of the locking portions (52a-52h) being configured to be inserted into each engagement groove, side walls of each engagement groove being engaged with each locking portion (52a-52h) so as to set a position in an axial direction of each solenoid component, and each locking portion (52a-52h) being engaged with a groove bottom of each engagement groove so as to set a phase around the axial center of each solenoid component. wherein the stepped portion is cutout from an engagement groove side in a radial direction of each of the assembly holes (20c-20e) such that the engagement groove is exposed outside of the assembly holes (20c-20e) when the solenoid components are assembled to the valve body, the stepped portion is cutout such that an upper surface of the stepped portion is located at a lower position than the groove bottom of the engagement groove when the solenoid components are assembled to the valve body through the fixing member so as not to interfere with the fixing member.