Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies E T , B r e i t > 5 GeV are selected in the Breit frame employing k and cone jet algorithms. In the kinematic region of squared momentum transfers 10 < Q 2 120 GeV 2 and Bjorken-x values 2 x 10 - 4 x B j 8 x 10 - 3 , jet shapes and subjet multiplicities are measured as a function of a resolution parameter. Distributions of both observables are corrected for detector effects and presented as functions of the transverse jet energy and jet pseudo-rapidity. Dependences of the jet shape and the average number of subjects on the transverse energy and the pseudo-rapidity of the jet are observed. With increasing transverse jet energies and decreasing pseudo-rapidities, i.e. towards the photon hemisphere, the jets are more collimated. QCD models give a fair description of the data.