NOVELTY - The apparatus has a first upper side flange portion (46a) and a lower side flange portion (48a) including a pressing portion which includes a projecting portion (58) projecting from a surface (79) facing an electric storage device (14) to-be-pressed on the storage device. A second upper side flange portion (46b) is provided at an end portion of a main plate portion (40) along predetermined direction. The second flange portion includes support portions which are contacted with the storage device at an opposite side with respect to the projecting portion along the predetermined direction.    USE - Electric storage apparatus e.g. assembled battery and secondary battery i.e. lithium ion battery, for a petroleum automobile and a diesel automobile.    ADVANTAGE - The apparatus can suppress heat conduction between the electric storage device and a circuit board in an effective manner. The projecting portion is formed with a distal end portion to smoothly guide the electric storage device toward the support portion when the electric storage device is arranged on the main plate portion of an insulation frame. The apparatus can suppress excessive deformation of the projecting portion of the main plate portion when large force is applied to the main plate portion along direction orthogonal to the main plate portion. The apparatus can suppress movements of the electric storage device along direction parallel to the main plate portion by providing the projecting portion at the first flange portion interposed between electric storage device and a first flange portion of the insulation frame. The electric storage device is contacted with the support portions, so that the electric storage device is accurately positioned without being inclined.    DETAILED DESCRIPTION - The support portion is a flat surface. The projecting portion is a rib. The electric storage device is a secondary battery i.e. lithium ion battery.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of an electric storage apparatus.    Electric storage device (14)    Main plate portion (40)    Upper side flange portions (46a, 46b)    Lower side flange portion (48a)    Support portions (55a, 55b)    Projecting portion (58)    Surface (79)