It has been well documented that preeclampsia (PE) has a common etiological background, but little is known about its linkage at the molecular level.Non- coding RNAs are critical posttranscriptional regulators ofgene expression.  This study was performed to determine whether PEis associated with alterations in placental non-codingRNAs expression. MicroRNA(miR)-155-5p and long non-coding RNA (lnc)sONE expression, in placentas collected sequentially from 59 patients with PE and 40 normotensive pregnancies were measured using real-time PCR.The relationship between miR-155-5p and lncsONE expressions wasanalyzed statistically. miR-155-5p expression was increased(fold change=1.6, P=0.04), whilelncsONE expression was not significantly changed(fold change=1.1, P=0.68), in placentas from patients compared with control group.miR-155-5p was upregulated in placentas from patients with PEand may have influencedeNOS expression. These findings indicate that miRNA-155-5p may be involved in PE pathogenesis and could be a potential biomarker for this disease.