\documentclass{article}
\usepackage{multirow}

\begin{document}

\begin{table}[h]
	\centering
	\begin{tabular}{|c|c|c|}
		\hline
		\multirow{2}{*}{Merged Cell} & Data 1 & Data 2 \\
		\cline{2-3}
					     & Data 3 & Data 4 \\
		\hline
		Row 2			     & Data 5 & Data 6 \\
		\hline
	\end{tabular}
	\caption{A table with a cell spanning two rows}
\end{table}

\end{document}	
