In this paper, we are concerned with a sharp fractional Trudinger-Moser type inequality in bounded intervals of R under the Lorentz-Sobolev norms constraint. For any $1<q<∞$ and $β≤ \big(\sqrt{π} \big)^{q'} \equiv β_q, q'= \frac{q}{q-1}$, we obtain
and $β_q$ is optimal in the sense that
for any $β>β_q$. Furthermore, when $q$ is even, we obtain
for any function $h : [0,∞)→[0,∞)$ with lim$_{t→∞} h(t) = ∞$. As for the key tools of proof, we use Green functions for fractional Laplace operators and the rearrangement of a convolution to the rearrangement of the convoluted functions.