Provided is an automotive front body structure that can prevent damages to an exterior garnish member or the like at the time of a mild crash situation while normally securing the exterior garnish member to a front bumper with an appropriate securing force. A lower bracket (17) made of stamp formed steel plate is provided between a lower part of the exterior garnish member and an upper part of the front bumper, and comprises a bracket main body (61) having a substantially Z-shaped cross section and a clamping portion (62) also made of stamp formed steel plate and having a substantially U-shaped cross section. The clamping portion (62) comprises a first clamping piece (62) secured to an upper wall portion (61a) of the bracket main body (61) and a second clamping piece (62b) that clamps the rib (22a) of the inner panel (22) in cooperation with the first clamping piece (62a). The clamping portion (62) of the lower bracket (17) is provided with a pair of clamping force generating mechanism (68) in a laterally spaced relationship, and each clamping force generating mechanism comprises a stepped bolt (65), a coil spring (66) and a nut (67). Thereby, a relatively large resilient claming force is produced for clamping the rib (22a) of the front garnish (8) with the clamping portion (62).